Magnetic Door Sensor: When the door sensor is triggered, the smart bulb will automatically turn on, and the alarm will automatically send an alarm, etc. Linking Function Human Body Infrared Detector: When someone enters the area, it can link smart devices like light bulbs/alarmsTemperature and humidity sensor: When the temperature reaches the set value, it will automatically connect to smart devices such as air conditionersTuya Smart is a one-stop smart home solution service application launched by Tuya Technology. Tuya Smart APP has functions such as remote control, one-touch connection, smart sync 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 light on the product must be in a fast flashing state (slow flashing: AP mode added), 2-The mobile phone must be the 2.4G signal of the selected router (5G wifi signal is not supported) 3- The WiFi password entered during the connection must be correct (the incorrect password does not allow connection to the internet) 4- Add again after restarting the router5-Restore the product to factory settings and add it again (press and hold the factory reset button for about 5 seconds, the light will flash rapidly)Quantity: 1 pieceSize: 105*37*5mmBatteries Not IncludedColor: White