Power gateway, install AAA batteries to sensor; put near gateway.
Long press reset 6s till indicator fast flash.
Add new device in Smart Life APP.
Pairing Steps
10GHz millimeter wave radar + PIR dual design, effectively reduce false alarms vs ordinary PIR sensors. Realize smart home linkage, compatible with Smart Life APP & Alexa.
ZigBee device, Tuya ZigBee gateway is mandatory for pairing.