wifi+interconnected photoelectric smoke alarms (SR-853W(I))

​This new type of SR-853W(I) smoke detector is a smart interconnected photoelectric smoke alarms. 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. more details ：https://www.firealarmfactory.com/interconnected-photoelectric-smoke-alarms.html