Tuya Smart Wired & Wireless 433MHz Wifi GSM Home Burglar Alarm System — Built-in Siren, App Control & Doorbell

Combination 433MHz wireless, Wifi and GSM Tuya Smart alarm system for home security with both wired and wireless support. Built-in loudly alarm siren — no additional wired siren required. APP Control: connect the unit to your wifi router via the mobile APP settings to arm, disarm and manage the system remotely anytime, anywhere. Doorbell Function: the APP contains a doorbell button so there is no need to install a physical doorbell on the wall; you can press the doorbell from the APP wherever you are. Alarm message languages can be switched among Chinese / English / Russian / Spanish / French / Italian / German / Polish. Supports 100 pieces of wireless detectors and support 4 wired defense; if you want install more than 4 wired detectors, you can add more quantities in series or parallel.