KERUI smart Wi‑Fi GSM home alarm system model W20 (KR‑W20). Supports up to 8 zones and 99 outputs, powered by DC 5 V. Integrates with the Tuya smart home platform and supports app control as well as GPRS alarm reporting. Includes a display and a password keypad, and the kit configuration includes door/window sensors. Video interface present and connection is wireless; arming via app is supported. CE certified.