Product Name: Factory Price Wireless Interlinked Lithium Battery Fire Smoke Alarm Interconnected Smoke Detector Model NO.: SR-851W(I) Working Voltage: DC3V Battery Alarm Sound: >85dB/3m Wireless Interconnection Frequency: 433/868MHz Gfsk Wireless Transmitting Distance: 200m (Open Area) Product Lifespan: 10 Year Operation: Can Be Connect 20 PCS Warranty: 2 Years Material: Fireproof ABS Material Trademark: SUMRING Transport Package: Carton Specification: ABS Origin: China HS Code: 8531901000 Product Description factory price wireless Interlinked Lithium Battery Fire Smoke Alarm Interconnected Smoke DetectorTechnical specification:wifi+interconneted smoke detector (SR-851WI)This new type of SR-851WI smoke detector is a smart wifi+interconnected detector. It can use wifi to connect to tuya or smart home APP to control fire safety with a smartphone. Meantime, it can be connect 20 pcs detectors which can display in the smart home or tuya app. Keep you away from the fire danger anytime, anywhere.Product pictures:Shipping information* Express(UPS, DHL, Fedex, EMS, etc) is available.* Sea and Air delivery is available* welcome your agent to deal with our products .Website: http://www.sumring.comInquiry now, we will reply you upon receive your email!