Smoke Detector for Alarm System 433MHz The Tuya 433MHz Smoke Detector is a reliable and essential component for your home or business security system. Designed to work seamlessly with Tuya's 433MHz alarm systems, it provides early detection of smoke and fire hazards, ensuring immediate alerts to keep you safe. Featuring a sensitive smoke detection sensor and an easy installation process, this device integrates effortlessly into your smart home setup, offering peace of mind with real-time notifications. Protect what matters most with the Tuya 433MHz Smoke Detector. Wireless Frequancy : 433MHz Battery : AA 1.5V 2pcs (Not Included) Alam Volume : 85db Wireless Distance : 50~80m (Open Space) Package Size 11.5x9x4.5cm G.W. : 0.200kg