The Mi Door and Window Sensor 2 is a 2-in-1 sensor that detects both the opening and closing of doors and windows, as well as the ambient light level. It is a small, white plastic sensor that is about the size of a thumb. It has a magnetic strip that runs along the top of the sensor, and two small metal contacts on the bottom. When the door or window is closed, the magnets in the strip hold the contacts together, completing a circuit and sending a signal to the hub. When the door or window is opened, the magnets separate, breaking the circuit and sending a different signal to the hub. The sensor also has a small light sensor on the front, which can be used to detect changes in ambient light level.

Specifications:

1. Model: LXLT-069759
2. Dimensions: 30 x 30 x 15.2 mm
3. Weight: 17g
4. Wireless connection: Bluetooth 5.1 BLE
5. Battery type: CR2032
6. Operating temperature: -10°C to 50°C
7. Warranty: 6 months

Features:

1. Detects both door and window opening and closing
2. Detects ambient light level
3. Sends notifications to your smartphone when a door or window is opened or closed
4. Can be used to trigger automations, such as turning on lights when a door is opened
5. Compact and easy to install
6. Long battery life