1. Sound Alarm & Arm Disarm Function 2. Door and Window Sound Alarm Sensor than can be Used with or without Wifi. If there is no WiFi, you can use the Button on the door sensor to do regulary Disarm/arm on the spot. So this is a multi-functional Door and Window Alarm Sensor. APP name: Tuya Smart/Smart Life Battery type: Alkaline battery (2x1.5V AAA battery, not include battery in shipment) Standby current: less than equal 180uA Alarm current: less than equal 70mA Sound alarm level: 80dB(within 1m) Working distance: equal 15mm Support arm/ disarm With Low Battery remind function Support all Tuya smart product Linkage control Working temperature: -10-55 Working humidity: 10% -90%RH Wi-Fi: IEEE 802.11 b/g 2.4GHz Colour:White Material:ABS Package Contents: 1 x Tuya smart door magnetic sensor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.