Smart Door Window Alarm Sensor Wireless Home Security Alarm System DIY Kit for Homes, Cars, Sheds, Caravans, Motorhomes

Features: Free APP mode, for Tuyasmart, one-click WiFi or AP mode to connect wifi. Long transmission distance, up to 45 meters, and strong network signal. Can work independently without hubs and is compatible with Alexa and Google home. Ultra-long standby time. Built in batteries, of which standby time last for 5 years. By connecting WIFI (2.4G only) and mobile phone connection, alert will be p...