VEVOR Automatic Curtain Opener, APP and Remote Control, Hub Included, Electric Smart Curtain Opener Compatible with Alexa and Google Home, Timed Opening and Closing, for U-shaped/I-shaped RailsWear-Resistant RollersHigh-Quality ABS ShellLight and Temperature SensorsCompatible with Smart DevicesSmarter FeaturesWide ApplicationMaximum Curtain Weight per Unit: 35 lbs / 16 kg,Compatible Track: U-Shaped and I-Shaped Rail,Item Model Number: LY-1998,Product Weight: 1.2 lbs / 0.56 kg,Material: ABS,Product Dimensions: 9.4 x 3.4 x 2.2 in / 240 x 86 x 55 mm,Remote Control Range: 32.8 ft / 10 m,Power: 8 W,Battery Capacity/Cell: 2000 mAh,Rated Voltage: DC 7.2 V,Battery Quantity: 2