Specification:
Battery: AAA 1.5V x 2 (Batteries not included)
Standby current: <10uA Alarm current:<160mALow power alert:<2.7V Protocol: IEEE 802.11b/g/n 2.4GHz Operating Temperature: -10-40 (14degF-104degF) Operating Humidity:20%-85% Standby time:6 - 12 months Size: Sensor:70x24x16(mm)/ Magnet:40x15x16(mm)Make sure you get the notifications on time. Please search for "how do I enable push notifications for an app?",and go into the app settings of your phone to make sure that they were all turned on and they were. Warm tips:Steps about opening the sound of the door sensor:1. Please open the app, clickme,then clicksetting, open sound.2.please find the following in you phone: "notifications"> "the app"> open "sounds". Then you will hear the sound~