App Control Remote Alarm. Telephone And Text Message Notification Maze Technology 80db Alarm, Ultra-Low Power Consumption 1. Input Voltage:DC3V LR03 2. Quiescent Current:Less than 15uA 3. Alarm Current:less than equal 160mA 4. Low Power And Undervoltage:Less than 2.4V 5. Alarm Sound Pressure:80DB/1m 6. Wifi:802.11b/G 7. Detection Range:20㎡ 8. Installation Method:Ceiling Installation 9. Working Temperature:-10℃ - +50℃ 10. Working Humidity:Maximum 95%RH Note: Power Supply:2 x AA Batteries (Not included batteries) Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Not Affect The Use. Colour:As Shown Material:ABS Package Contents: 1 * Tuya Sensor 1 * English Manual 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.