Tuya Smart WiFi Infrared Detectors Motion Sensor Alarm Compatible With Tuyasmart APP Smart Life APP
You can choose the 4 kinds of detector. 
Kind A is wifi version, support tuyasmart APP. Kind B is RF 433MHz version, Kind B not support phone APP control.
Option A: Wifi infrared detector.
How to connect wifi?
Option A support Wifi. Option B does not support wifi, it is 433MHz wireless detector, need works with the 433MHz receiving alarm host.

















Option B: RF 433MHz Wireless
Option B is RF 433MHz version, it does not support wifi app function. Please read it careful when you buy it. The 433MHz version infrared detector is compatible to the 433MHz home burglar alarm system in our store.