Please refer to the spec. sheet of this sensor:

MSA201 B4---24GHz TUYA BLE Millimeter Lifebeing Sensor

1. Product Features/Descriptions

MSA201 B4 is a 24GHz radar sensor based on Merrtek patented orthogonal half-wave bending antenna. Its antenna has high gain and wide detection range and is combined with Merrytek’s unique software algorithm. It can accurately detect minor movements brought by human in almost all indoor spaces and provide fast and accurate front-end sensing input for presence detectors, smart hotel, smart office and other  scenes.

2. Product Application

*Heath care

*presence detectors

*Intelligent lighting

*Smart hotel

*Smart energy comsumption conntrol

*Home security

3. Dimension

4.Function & Wiring Diagram

5. Initialization

When the first power-on, indicator turns off after flashing for 20 seconds. Sensor does not detect moving signal during initialization. Turning ON/OFF indicator, hold time and detection area can be controlled by APP.