Features : :- Heavy-duty super quiet smart WiFi motorized curtain motor work with mobile Apps- Strong mains powered motor, anodized aluminum. DIY length by cutting. Automatically configure and remember travel limit- Open and close via smartphone, tablet, remote control, or voice commands from App- Powered by Li-ion battery ( included ), up to 3 - 6 months stand by time- RF remote control or wire into other automation systems. Free to operate manually during power-cut- Light touch trigger, manual pulling to trigger the motor to react and operate automaticallySpecifications: Brand Aqara(Xiaomi ecological chain ) Model B1 Smart Curtain Motor Dimension 49.5*49.5*371mm Weight 1554g Technology Parameters Power 28W Standby time 3 - 6 months Power Supply 3030mAh Li-ion battery ( included ) AC 100 - 240V, 50/60Hz, 1A Max. load 50kg Move speed 12cm/s Waterproof IP40