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Last updated September 2026

SwitchBot Lock Pro

A quick-install retrofit lock that mounts over your existing deadbolt (keeping your key), with a powerful motor, an optional rechargeable Power Pack and remote control via a SwitchBot Hub, but keypad, fingerprint and face unlock are separate add-ons.

3.9
1,363 ratings
$87.99
As an Amazon Associate I earn from qualifying purchases
Launch Year: 2023

Model: W3500004

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Our review

SwitchBot Lock Pro Review: A Renter-Friendly Retrofit Smart Lock With a Strong Motor and a Plastic-Plate Caveat

The verdict

The SwitchBot Lock Pro is a retrofit smart lock that fits over the inside of your existing deadbolt, so you keep your original key and exterior hardware, which makes it a favorite for renters and apartments where you cannot swap the whole lock. Owners praise the quick roughly 10-minute install (with adapters for many cylinders), a motor noticeably stronger than a Nuki, operation over Bluetooth even during an internet or power outage, and an optional rechargeable Power Pack (sold separately) so you can charge one battery while the other runs. Add a SwitchBot Hub and you get remote lock/unlock, status, push alerts, auto-lock and low-battery warnings, plus Alexa, Google Home, HomeKit and (with Hub 2) Matter, while Home Assistant works directly. The caveats are real: the deadbolt mounting plate is plastic, which several owners find flimsy and a security concern, and there are scattered reports of the final turn of the bolt not completing (a software issue SwitchBot has improved via updates) and of units failing within weeks to months. Auto-lock needs a door-frame magnet and a flush frame, guest access requires others to install the SwitchBot app, and passcode, fingerprint and facial recognition are all separate Keypad accessories. For renters or anyone who wants keyless entry without replacing their lock, it is compelling, just weigh the plastic-plate and reliability notes.

Best for
  • Renters and apartments
  • Keeping your existing key and lock
  • Quick retrofit installation
  • Home Assistant or SwitchBot ecosystem users

Pros

  • Renter-friendly retrofit: keeps your existing deadbolt and key
  • Quick ~10-minute install with adapters for many cylinders
  • Strong motor, smooth even on stiffer locks
  • Works over Bluetooth during internet or power outages
  • Optional rechargeable Power Pack and useful auto-lock and logs
  • Broad integrations via a hub, plus direct Home Assistant support

Cons

  • Plastic mounting plate that some find flimsy and a security concern
  • Reports of the bolt not completing its final turn (improved by updates) and some early failures
  • Remote control and most integrations require a SwitchBot Hub
  • Keypad, fingerprint and facial recognition are separate accessories
  • Auto-lock needs a door-frame magnet and a flush frame; guest access needs the app

Who is the SwitchBot Lock Pro for?

This is a retrofit smart lock that mounts over the inside of your existing deadbolt rather than replacing it, so your exterior hardware and physical key stay the same, ideal for renters. It runs over Bluetooth, with remote control and most integrations (Alexa, Google Home, HomeKit, SmartThings, IFTTT, and Matter via Hub 2) requiring a SwitchBot Hub, while Home Assistant is supported directly. Passcode, fingerprint and facial recognition are provided by separate SwitchBot Keypad accessories, and NFC tag and physical-key entry are supported (Apple Home Key is not). It runs on 4 AA batteries (rated around 9 months) with an optional rechargeable Power Pack sold separately, plus auto-lock, geolocation and door-open detection. It best suits renters and apartments, anyone who wants to keep their existing key, quick retrofit installs, and Home Assistant or SwitchBot users. If you want a built-in keypad, a fully metal build, or Wi-Fi without a hub, read the caveats first.

What buyers love

The retrofit design is the biggest draw: it installs over your existing deadbolt in about 10 minutes (with adapters that fit many cylinders), keeps your original key, and is invisible as a smart lock from outside, which owners repeatedly call renter-friendly and perfect for apartments where the landlord needs key access. The motor is a highlight, described as stronger than a Nuki and smooth even on stiffer locks, and the lock keeps working over Bluetooth during an internet or power outage. Battery life is good, and the optional rechargeable Power Pack (sold separately) lets you charge one battery while the other is in use. Paired with a SwitchBot Hub Mini, owners get remote lock/unlock, accurate door status, push notifications, timely low-battery alerts, and auto-lock (with a configurable geolocation radius and a recently added auto-unlock), and it integrates with Alexa, Google Home and HomeKit through the hub, plus Home Assistant directly. The app's access logs are called very helpful, it is quieter than expected, there is a one-touch lock/unlock button, and multiple owners praise responsive support that sends fast replacements and pushes updates to fix issues. Several are on their second or third unit or have recommended it to friends.

What to know before you buy

The most pointed complaint is the mounting plate: the part that holds the lock to your deadbolt is plastic, which some owners find flimsy and a security worry (the bolts can bend if overtightened, and they feel it could be pried), despite marketing that emphasizes metal construction. Reliability is mixed: a recurring issue is the bolt not completing its final turn so the door will not open, which SwitchBot has addressed with software updates, and some owners report units failing within a few days to several months (with replacements provided). Setup can be frustrating, a few found the Hub Mini instructions wrong and the app unintuitive, often resolved by rebooting and starting over. Auto-lock requires installing a magnet on the door frame, and the frame must sit flush with the door or it will not work reliably (one owner had to modify their frame). Giving guests access requires them to install and configure the SwitchBot app (there is no simple standalone guest code without the Keypad). Importantly, keypad passcodes, fingerprint and facial recognition are not built in, they need the separate SwitchBot Keypad or Vision Keypad. Other notes: the tiny mounting screws can be fiddly with the included allen wrench, the unit is somewhat bulky, and remote features depend on a hub.

Is the SwitchBot Lock Pro worth it?

For renters and anyone who wants keyless entry without replacing their lock, the SwitchBot Lock Pro is a strong option: a fast retrofit install that keeps your key, a powerful motor, Bluetooth operation that survives outages, an optional rechargeable Power Pack, useful auto-lock and logs, and broad integrations through a hub plus direct Home Assistant support. The trade-offs to weigh are the plastic mounting plate that some find flimsy, scattered reliability and final-turn issues (improved by updates), a hub-dependent and app-dependent workflow for remote and guest access, and the fact that keypad, fingerprint and face unlock are separate accessories. Buy it if the renter-friendly retrofit approach and SwitchBot or Home Assistant ecosystem fit your needs; if you want a rugged all-metal lock with a built-in keypad and no extra hub, consider a full-replacement smart lock instead.

Frequently asked questions

Do I need to replace my existing lock?

No, and that is the point. The Lock Pro mounts over the inside of your existing deadbolt, so your exterior hardware and physical key are unchanged. This makes it popular with renters and apartment dwellers, since the landlord keeps their key and there is no sign of a smart lock from outside.

Does it need a hub, and does it work without internet?

The lock itself works over Bluetooth, including during an internet or power outage. However, remote lock/unlock and most integrations (Alexa, Google Home, HomeKit, and Matter via Hub 2) require a SwitchBot Hub. Home Assistant is supported directly. Without a hub you are limited to nearby Bluetooth control.

Does it include a keypad or fingerprint reader?

No. Passcode entry, fingerprint and facial recognition all require a separate SwitchBot Keypad (or Vision Keypad for face). The lock itself supports NFC tags and your physical key (it has no Apple Home Key), plus app and Bluetooth control, so budget for the Keypad if you want code or biometric entry.

Is the build secure and durable?

The motor is strong, but the mounting plate that holds the lock to your deadbolt is plastic, which some owners find flimsy and a security concern. Reliability is mixed too: some report the bolt not completing its final turn (addressed by software updates) or units failing within weeks to months, though SwitchBot's support is praised for fast replacements.

How does auto-lock and guest access work?

Auto-lock relies on a magnet you install on the door frame, and the frame needs to sit flush with the door for reliable open/close detection. There is also geolocation-based auto-lock and a newer auto-unlock. Guest access requires each guest to install and set up the SwitchBot app, unless you add a Keypad for standalone codes.

At a glance

Summary

Everything this door lock supports, grouped by category.

Size & Materials
Inner Panel Dimensions (4.7 × 2.3 × 3.3 in, 120 × 59 × 83.9 mm)15.3 oz (435 g)Available in colors
Power
Backup Battery (Sold separately)
Connectivity
Bluetooth
Integrations
Google Home (SwitchBot Hub required)Alexa (SwitchBot Hub required)Apple HomeKit (SwitchBot Hub required)Samsung SmartThings (SwitchBot Hub required)Home AssistantMatter (SwitchBot Hub 2 required)
Lock/Unlock System
RemoteBluetoothPasscode (Keypad required)Fingerprint (Keypad required)Face Recognition (Vision Keypad required)NFC TagPhysical Key
Automatic Lock / Unlock
When AwayAfer Door is closedBy Geolocation
Alerts
Door Locks/UnlocksLow Battery AlertMultiple Unlocking Failure Alert
Features
One-Time PasswordPeriodic PasswordAnti-peep PasswordEmergency Fingerprint

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Company
SwitchBot logo

SwitchBot

4.2/ 5 avg ratingHong Kong flagHeadquartered in Hong Kong

SwitchBot makes a versatile range of smart home gadgets, most famously the SwitchBot Bot that physically presses existing buttons and switches. Its catalog includes curtain robots, smart locks, sensors, plugs and the SwitchBot Hub, which adds IR control and Matter compatibility. SwitchBot is popular for making non-smart devices smart without rewiring.

Full specifications

Every spec, organized

Browse the full breakdown by category. Tap the on any row for what it means, or the for sources and documentation.

Size & Materials
Weather Resistance

NO

Outer Panel Dimensions

-

Inner Panel Dimensions

4.7 × 2.3 × 3.3 in (120 × 59 × 83.9 mm)

Weight

15.3 oz (435 g)

Available in colors

YES

Power
Battery Type

4x AA

Battery Life

9 months

Backup Battery

Sold separately

The optional SwitchBot Dual Power Pack (two rechargeable lithium-ion batteries) is sold separately; the lock ships with 4 AA batteries and, with a flat battery, a passive power supply can still unlock the door.

Connectivity
2.4 GHz WiFi

NO

5 GHz WiFi

NO

Bluetooth

YES

Z-Wave

NO

Zigbee

NO

Thread Protocol

NO

Other

NO

Integrations
Google Home

SwitchBot Hub required

Alexa

SwitchBot Hub required

Apple HomeKit

SwitchBot Hub required

Samsung SmartThings

SwitchBot Hub required

Home Assistant

YES

Matter

SwitchBot Hub 2 required

Lock/Unlock System
Remote

YES

Bluetooth

YES

Passcode

Keypad required

Fingerprint

Keypad required

Face Recognition

Vision Keypad required

NFC Tag

YES

Apple Home Key

NO

SwitchBot states that its Lock products (Lock, Lock Pro and Lock Ultra) do not support Apple Home Key.

Physical Key

YES

Automatic Lock / Unlock
When Away

YES

Afer Door is closed

YES

By Geolocation

YES

Alerts
Door Locks/Unlocks

YES

Tamper-proof Alert

NO

Low Battery Alert

YES

Multiple Unlocking Failure Alert

YES

Video
HD Video

NO

2K Video

NO

Night Vision

NO

Internal Storage

NO

MicroSD Card Slot

NO

Motion Detection

NO

Range Of Detection

-

Customizable Area

NO

Sensors
Door Open/Close

NO

Features
One-Time Password

YES

Periodic Password

YES

Anti-peep Password

YES

Emergency Fingerprint

YES

Doorbell

NO

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