The Aqara Motion Sensor detects human movement with passive infrared. It works with other smart accessories to set various scenes, such as, turning on or off lights automatically when it detects activity or inactivity. It consumes low energy. No tools are required to install it, and you can simply place or stick it almost anywhere.

Feautres:
170-degree motion detection: You will be able to use the stock ultra-wide angle of the sensor or limit it using any obstacle or a regular electric tape.
Easy and flexible installation methods: No tools required for installation. With a sensor stand and sticker, you can set the motion sensor wherever you want. The stand can make a 360 rotation and you can easily adjust the detection angle.
Remote security notification: With the Motion Sensor, you can turn on alarm mode when you leave the house. If motion is detected, the Hub will sound an alarm and send a notification to your phone.
Automatically Turns Lights on or off: When motion is detected in the evening, the Hub light can be automatically turned on.
2-Year Battery Life: A tiny battery can provide the Temperature and Humidity Sensor with a solid battery life of 2 year and even more.
Smart Control in Apple Home App: Works with other HomeKit-enabled accessories in Apple Home app to make your life easier.
Advanced Technology: A Japanese infrared sensor is used to detect human motion through the moving heat source and the US Polyolefin Fresnel lens is used for high precision detection. The shell is made of anti-UV material and the colour will not fade allowing for long-term usage. The high quality flame-retardant material is used to improve safety.

Specifications:
Model: RTCGQ11LM
Battery: CR2450
Wireless Protocol: Zigbee
Dimensions: 30 × 30 × 33 mm (1.18 × 1.18 × 1.30 in.)
Maximum Detection Distance: 7 m
Maximum Detection Angle: 170°
Operating Temperature: -10℃~+45℃ (14℉~113℉)
Operating Humidity: 0 - 95%RH, non-condensing
What's in the Box: Motion Sensor x 1, Stand x 1, Sticker x 1, Quick Start Guide x 1
App: Apple Home app (iOS 10.3 or later), Aqara Home app (Android 5.0 or later, iOS 10.3 or later)