Wireless home anti-theft: including host, infrared, SOS, door sensors, buttons, keypads, buzzers, etc.; 2.4-inch color IPS screen, real-time main interface status bar, data and clock are displayed, and the host status is very clear. It supports multi-language menu, voice operation and SMS alert. WiFi GSM Home Alarm: Connect to Wi-Fi (2.4G) via Tuya APP and place the sensors where you need them most. The ultra-high decibel siren helps deter intruders. Hub has a built-in rechargeable battery. It can continue to work for 2-3 hours in emergency situations such as power outages. Wireless Home Burglar Alarm: Supports up to 99 wireless sensors and 4 wired zones and 10 remote controls. Add additional door/window sensors, motion detectors, keypads, water leak sensors, doorbells and more to quickly and easily expand your whole house enclosure to fit the size and layout of your home. Easy installation: All sensors have been configured, and the effective distance between the sensors and the control panel is 80 meters. (with accessibility)