Mini Smoke Detector is wonderful Safety & Security Guard for your home security. 360° comprehensive highsensitivity monitoring This Smoke detector designed with LOW voltage & faultprompt function and warning when low power, with Self-test function. You be alerted immediately in the event of a fire,to help you escape from Fire Hazard in time. Input Voltage:DC3V LR03(Not Include) Static current:less than 10uA Alarm Current:less than 100mA Low battery alert:≤6.5±0.5V Alarm Sound Level: 80db/2m(2.4GHz) WIFI: 802.11b/g Working Temperature:-10-50℃ Working Humidity:95%RH ≤95%RH Tuya/Smart Life APP control Works with / assistant( plugins) Note: Power Supply:DC9V Alkaline Battery(6LR61-Not Include) Type: Smoke Detector color:White Material:ABS size:106 x 106 x 41.5mm Package Contents: 2 x 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.