LiftMaster 828LM Internet Gateway

Length x Width x Height

- Length: the longest side of the device

- Width: the shorter side of the device

- Height: the vertical dimension of the device

For complete openers this is the motor head, not the rail, which adds roughly 3 metres of length along the ceiling.

The physical weight of the device, typically measured in grams (g) or ounces (oz).

Retrofit controllers weigh a few hundred grams and stick to the ceiling or wall, while complete opener motor units weigh 10 kg or more and need solid overhead mounting.

Powered by a direct electrical connection, either a mains outlet in the garage or the low-voltage terminals of the opener itself.

Wired power ensures continuous operation without battery maintenance, which matters for a device whose whole job is to answer when you are not home.

An integrated rechargeable battery that keeps the opener working during a power cut, usually rated in door cycles (for example, up to 50 cycles from the moment power is lost).

California requires battery backup on every residential garage door opener sold in the state, so most complete openers on the US market now include it. Retrofit controllers generally do not, since they depend on the host opener for power anyway.

A built-in battery that can be recharged without replacement, used by exterior keypads and wireless accessories that have no power line to draw from.

Rechargeable batteries are more convenient and environmentally friendly than disposable batteries, but they do mean the device stops working if you forget to charge it.

How long the device runs between charges or battery replacements.

This applies to battery-powered parts of the system: exterior keypads, wireless door-position sensors and remotes. Wireless tilt sensors typically run for a year or more on a coin cell, while camera keypads need recharging every month or two.

This category covers two very different products at two very different prices, plus the access accessories that go with them.

- Controller: a small retrofit box that adds Wi-Fi to the garage door opener you already own, typically $30 to $80.

- Opener: a complete replacement unit with its own motor, rail and smart radio, typically $200 to $550.

- Keypad: an exterior access device that opens the door with a PIN instead of a remote.

If your existing opener works fine, a controller gets you app and voice control for a fraction of the price. Buy a complete opener when the old unit is failing, is too loud, or predates the 1993 safety-sensor mandate.

How a complete opener transmits force to the door. Retrofit controllers have no drive of their own and report a dash here.

- Belt drive: a steel-reinforced rubber belt. The quietest option and the right choice when there is a bedroom over the garage.

- Chain drive: a metal chain. Cheapest and most durable, but noticeably louder and more prone to vibration.

- Screw drive: a threaded steel rod. Fewer moving parts, middling noise.

- Direct drive: a wall-mounted motor that turns the torsion bar directly, with no overhead rail at all.

The rated power of the opener motor, quoted in horsepower (HP) or in horsepower-comparable units (HPc) for DC motors.

1/2 HP handles a standard single or light double door. 3/4 HP and 1.25 HPc suit heavy insulated, wooden or oversized double doors, and lift them faster with less strain.

A jackshaft opener that bolts beside the door and drives the torsion bar, instead of hanging from the ceiling on a rail.

Wall mount units free up the entire ceiling for storage racks, car lifts or a high-lift door track, and they run with much less vibration because the motor is not suspended overhead. They cost considerably more and need a torsion-bar door in good condition.

The tallest door the unit can drive with the rail supplied in the box.

Most openers ship for a 7 ft door and support 8 ft or 10 ft with an extension kit sold separately, so check this before buying if your garage has a raised door.

Security+ 2.0 is the rolling-code radio used by Chamberlain, LiftMaster and Craftsman openers made since roughly 2011, identifiable by a yellow learn button.

These openers refuse a plain dry-contact connection, so a retrofit controller either has to speak Security+ 2.0 natively or use an adapter such as the RGR910. Get this wrong and the controller simply will not trigger your door.

The controller triggers the door by briefly shorting the two wall-button terminals on the opener, exactly like the button inside your garage.

This is the universal method: it works with practically any opener that exposes low-voltage terminals, regardless of brand or age, which is why dry-contact controllers advertise compatibility with hundreds of models.

How many separate garage doors a single unit can open and monitor.

Multi-door controllers save money and app clutter in a two or three car garage, though extra sensors and wiring are often sold separately.

The unit can also drive a swing or slide gate operator, not only a sectional garage door.

Useful on a property with a driveway gate, since one controller and one app then cover both entrances.

Range: The 2.4 GHz band offers a longer range, meaning it can cover larger areas and penetrate solid objects like walls more effectively than 5 GHz.

Speed: Generally, 2.4 GHz provides slower speeds compared to 5 GHz due to a lower maximum data rate.

Interference: More prone to interference since many other devices (like cordless phones, microwaves, and Bluetooth devices) operate on the 2.4 GHz frequency, leading to potential congestion and slower network performance.

A detached or concrete garage is one of the worst Wi-Fi spots in a house, so 2.4 GHz reach is the practical reason nearly every garage controller sticks to this band.

Range: Offers a shorter range compared to 2.4 GHz and may have difficulty penetrating walls and other obstacles.

Speed: Typically provides faster speeds and higher data rates due to more available bandwidth.

Interference: Less prone to interference as fewer devices operate on this frequency, leading to a more stable connection.

Ethernet is a widely used technology for wired networking, providing a stable and high-speed connection between devices on a local area network (LAN).

Stability and Reliability: Because it uses a wired connection, Ethernet is less susceptible to interference from other devices and physical barriers, leading to a more stable and reliable connection.

In this category Ethernet belongs to gateway-style products that sit next to the router rather than in the garage, and talk to the opener over its own radio link.

Bluetooth is a wireless communication technology used for exchanging data over short distances.

In garage products Bluetooth usually serves one of two jobs: guiding the initial setup from your phone before Wi-Fi credentials are entered, or carrying the signal from a battery door-position sensor back to the controller.

Z-Wave is known for its low power consumption, making it ideal for battery-powered devices. It supports a mesh networking topology, allowing devices to communicate with each other directly or through intermediary nodes, thus extending the overall network range and enhancing reliability. The protocol supports data rates of up to 100 kbps, suitable for transmitting control commands and sensor data.

A Z-Wave garage controller keeps everything on your own hub with no cloud account, which is why it remains popular with people running local automation systems.

Zigbee is a wireless communication protocol designed for low-power, short-range applications, commonly used in smart home devices, industrial automation, and other areas requiring reliable, low-data rate communication. It features low power consumption, making it ideal for battery-operated devices, and supports short-range communication, typically up to 100 meters. Zigbee employs mesh networking, allowing devices to relay data through each other to extend range and improve reliability. It supports data rates up to 250 kbps, suitable for small data packets, and ensures interoperability among devices from different manufacturers if they conform to Zigbee standards. Security is robust, with AES-128 encryption for data protection.

Zigbee devices need a Zigbee-compatible hub to connect and communicate with other devices in your smart home setup.

Thread is a wireless communication protocol designed specifically for Internet of Things (IoT) devices, providing secure, reliable, and scalable networking. Unlike some other protocols, Thread is IP-based, which means it can seamlessly integrate with existing internet infrastructure. It operates in the 2.4 GHz frequency band and uses mesh networking to enhance reliability and extend range by allowing devices to relay data through each other.

Thread is optimized for low power consumption, making it suitable for battery-operated devices. It supports low-latency communication, which is crucial for real-time applications like home automation and security systems. The protocol ensures high security with AES-128 encryption and end-to-end security at the network layer.

Thread-enabled devices require a Thread Border Router (such as certain smart home hubs or routers) to connect to your home network and other Thread devices.

Additional connectivity options not covered by the standard protocols.

Garage openers rely heavily on proprietary sub-GHz radio for their handheld remotes and keypads, typically 315 MHz, 390 MHz or the tri-band Security+ 2.0 scheme. That link is what a remote uses, and it keeps working even when the internet is down.

Google Home serves as a central hub for a variety of smart devices, including lights, thermostats, cameras, and speakers. It leverages Google Assistant for voice control, enabling users to manage their smart home with simple commands.

Note that garage integrations are a moving target here: myQ discontinued its Google Assistant integration, so check current status rather than the claim printed on an older box.

Amazon Alexa is one of the most widely used smart home systems, known for its compatibility with a vast array of devices. Users can control everything from smart lights to appliances using voice commands through Echo devices.

Alexa always asks for a spoken PIN before opening a garage door, since an unattended open is a security risk in a way that switching on a lamp is not.

Apple HomeKit is designed for users in the Apple ecosystem, providing a seamless way to control compatible smart devices through iOS devices using the Home app or Siri. It emphasizes security and user privacy.

This is the single most requested feature in the category and the sharpest dividing line between brands: some controllers expose the door as a native HomeKit garage accessory, while the best-selling one on the market offers no HomeKit support at all.

SmartThings is a flexible platform that connects a wide range of devices from different brands, offering a unified interface for control. It supports various communication protocols, allowing for extensive device compatibility.

Home Assistant is an open-source platform that allows for extensive customization and integration of a wide variety of smart devices. It supports a multitude of protocols and brands, making it ideal for tech-savvy users.

Garage control has a long history of friction here. Cloud-only systems have repeatedly blocked unofficial integrations, so the safest picks are the controllers that publish a local API or an official Home Assistant integration rather than those reached through a reverse-engineered cloud login.

IFTTT (If This Then That) is a web-based service that allows users to create simple automation sequences, known as applets, which enable different devices, services, and applications to work together seamlessly. It connects a wide range of products and services, facilitating interoperability and enhancing functionality.

Matter is a unified, open-source connectivity protocol designed to standardize and simplify communication between smart home devices from different manufacturers. Developed by the Connectivity Standards Alliance (formerly the Zigbee Alliance), Matter aims to improve interoperability, security, and reliability across various smart home ecosystems.

Matter operates over existing networking technologies, including Ethernet, Wi-Fi, and Thread, providing flexibility in device connectivity. Its IP-based nature allows seamless integration with existing internet infrastructure and cloud services.

Matter added a garage door device type in version 1.2, which lets a controller appear in Apple Home, Google Home and Alexa at once without a brand-specific integration in any of them.

How the system knows whether the door is actually open or closed. Without this the app can only guess, and a false 'closed' is worse than no app at all.

- Wireless tilt: a battery sensor taped to the top panel that reports its angle. Easy to fit, but needs a battery change and can drift out of alignment.

- Wired magnetic: a reed switch on the floor track wired back to the controller. Needs a cable run, never needs a battery, and rarely reports a false state.

- Built-in: complete openers track the motor position themselves and need no extra sensor.

A pair of infrared beam sensors mounted near the floor on each side of the door that reverse it if anything crosses the opening while it closes.

US law has required these on residential openers since 1993. Complete openers include them in the box; retrofit controllers rely on the ones already fitted to your existing opener, which is precisely why a controller must never be installed on a pre-1993 unit.

How many handheld radio remotes come in the box.

Complete openers normally ship with two or three visor remotes, while retrofit controllers ship with none because they reuse the remotes you already have. Replacement remotes cost $20 to $40 each, so a unit with three included is worth more than the price gap suggests.

An exterior keypad mounted beside the door that opens it with a numeric code, no phone or remote needed.

This is the classic answer to letting in a dog walker, a cleaner or a child who has lost their keys, and it keeps working when the Wi-Fi does not.

The app can grant another person access to the door, ideally with a schedule or an expiry so a contractor gets in on Tuesday morning only.

Check whether guest access is limited to a fixed number of accounts and whether it is one of the features locked behind a paid plan.

The system uses your phone's location to draw a virtual boundary around the house, then opens the door as you arrive or closes it once you have driven away.

It is the feature that removes the remote from your life entirely, but it depends on reliable background location on the phone, so accuracy varies more than any other item in this table.

A push notification every time the door opens or closes, with the time and, on some systems, which user or code triggered it.

This is what turns a garage opener into a security device: you find out that the door moved at 3 am whether or not you are looking at the app.

A warning after the door has stayed open longer than a threshold you set, typically 10 or 30 minutes.

Leaving the garage open is the most common way a house is left unlocked overnight, and this alert plus an auto-close rule is the pair of features that fixes it.

The door can be opened and closed from inside your own network without a round trip to the manufacturer's servers, through a documented local API, a native Matter or HomeKit connection, or an official local integration.

Local control means the garage still answers during an internet outage, responds in milliseconds instead of seconds, and cannot be switched off by a vendor decision. It is the single most important feature for anyone running Home Assistant.

Every advertised feature works without a paid plan: app control, alerts, history, voice assistants and third-party integrations.

This is the sharpest cost difference in the category. Some ecosystems put video history, extra devices or the smart-home integrations themselves behind a plan that can cost more per year than the hardware did, while most independent controllers charge nothing at all.

The door closes itself after a set delay once it has been left open.

Safety rules require a warning before an unattended close, so expect the unit to flash its light and sound a buzzer for several seconds first.

A rule that closes the door at a fixed time of day, for example every night at 10 pm.

Unlike auto close, which counts minutes from when the door opened, this one guarantees the garage is shut before bedtime no matter what happened during the day.

An integrated camera that shows a live view of the garage, letting you confirm what the door is doing and who is standing at it before you press open.

Cameras appear in the premium tier of complete openers and in video keypads. Check whether recorded clips are stored free or need a subscription, since that is usually where the ongoing cost hides.

A speaker and microphone that let you talk to whoever is at the garage from your phone.

Paired with a camera it turns the garage entrance into a second front door, which is useful for directing deliveries to leave a parcel inside.

Integrated LED lighting on the opener, quoted in lumens where the manufacturer publishes a figure.

The gap between a pair of old bulb sockets and a 2,000 lumen corner-to-corner panel is the difference between a shadowy garage and one you can actually work in. On smart models the light is also controllable from the app and can be tied to door events.

A motorised deadbolt that drives into the door track every time the door finishes closing.

It defeats the classic break-in where a wire hooked through the top of the door pulls the emergency release cord, which is otherwise a well-known weakness of every sectional garage door.

The garage can be opened by a courier for a one-time delivery, through services such as Amazon Key In-Garage Delivery or Walmart InHome.

It keeps parcels out of sight and out of the rain without giving anyone access to the house itself. Availability depends on the country and on the delivery service, not only on the hardware.

The ability to create automated actions based on sensor readings or schedules.

Automations can trigger other smart devices, send notifications, or adjust settings without manual intervention. A common one is turning on the hallway light and disarming the alarm when the garage door opens.

The ability to track and store historical data over time.

A dated log of every open and close, and of who triggered it, is how you find out when a teenager got home or whether the cleaner came on Thursday. Retention is often the thing a paid plan extends, from a couple of weeks to a month or more.