Specifications:
Alarm Battery : 4.2V 700mAh lithium battery, working time about 1-3 months, standby time about 6 months.
Alarm Charge Port: Standard USB-C 5V (some quick chargers may not be compatible)
Remote Battery: WLO3C: 27A(12V) Alkaline battery, working time about 1-2 years (5 times per day)
Working Frequency: 433.92MHz
Working Environment Temperature: -40 ~ +70℃
Working Environment Humidity: Storage Temperature: -40 ~ + 70 ℃

Low Battery Warning & Charging:
1. Check whether the remote control indicator can light up. If not or light weak, please replace the remote control battery.
2. The alarm is in low power consumption mode when you receive. In this mode, remote can not control the alarm. Please charge the alarm at least 1 minute to activate before use, otherwise remote can't control the alarm.
3.If alarm have been charged and activated, remote still doesn' t work, please pair the remote and alarm again. The pairing method please see 3.3.