Smart Alarm System Home WIFI GSM GPRS Burglar Motion Sensor Tuya App Security
Built-in alarm siren: 110dB. GSM network frequency : 850/900/1800/1900mHz Support 2G GSM network. One machine two networks - Support WIFI/GSM/GPRS/2G. Also work with Amazon Alexa. Uninterrupted network, safer and more assured.