Door Magnetic Sensor: When the door sensor is triggered, the smart bulb will automatically light up and the alarm will automatically send an alarm, etc. Link Function Infrared Human Body Detector: When someone enters the area, it can link smart devices like light bulbs/alarms Temperature and Humidity Sensor: When the temperature reaches the set value, it can Automatically connects to smart devices such as air conditioners Tuya Smart is a one-stop smart home solution service application launched by Tuya Technology. Tuya Smart APP has functions such as remote control, one-key connection, smart timing reminder and family sharing, which can help you easily control smart hardware products at home with your mobile phone. If the product fails to connect to the network, please troubleshoot in the following order:1-The LED on the product should be in fast flashing state (slow flashing: AP mode added), 2- The mobile phone must be the selected router's 2.4G signal (5G wifi signal is not supported) 3- The WiFi password entered when connecting must be correct (the incorrect password does not allow to connect to internet) 4- Add again after router reboot5-Restore product to factory settings and add again (press and hold the restore factory settings button for about 5 seconds, the light will flash rapidly)Quantity: 1 pieceSize: 105*37*5mmBatteries not includedWhite color