This device only can work along with a Zigbee Gateway. You need to connect wifi with a zigbee gateway successfully before use such zigbee 3.0 sensor. Turn on the device and smart speaker, they will be connected automatically. The device is also compatible with eWeLink ZigBee Gateway Hub. Specifications include APP Name: Tuya Smart or Smart Life, Battery type: AAA1.5V*2, Input Voltage: DC3V LR03, Quiescent Current: ≤10uA, Alarm Current: ≤160mA, Low Power Undervoltage: ≤2.7V, Magnetic Control Distance: ≥15mm, Working temperature: -10℃~50℃, Working Humidity: max 95%RH, Wireless Type: Zigbee 3.0. Features include ready-to-go installation, control channels, alarm alert, alarm recording, device share, low voltage remind, and works with alexa and Google Assistant. Package includes 1xDoor Sensor, 1xUser Manual, and 1xDouble-sided tape.