Low Noise Gear: The low noise gears allow quiet operation in about 55 decibels, without affecting your normal work. Wide Voltage Motor: A durable motor that uses wide voltage technology can prevent burning caused by unstable input voltage, ensuring reliable and long-lasting performance. Application This door opener has the function of automatically and manually opening and closing doors and is widely suitable for various materials doors such as wood, aluminum, and steel for commercial and residential use. It can be installed in offices, hospitals, nursing homes, banks, hotels, apartment buildings, warehouses, and other fields. Specifications Material: Aluminum Alloy, ABS Color: Silver, Black Style: Modern Assembly Required: Yes Voltage: 110~220V ±10% Power: 50W Opening Time: 3~7s/90° Hold Open Time: 1~30s Max. Door Frame Depth: 450mm/17.71in Door Width: Min. 660mm/26in / Max. 1200mm/47.24in Max. Opening Angle: 120° Max. Door Weight: 100KG/220lbs Environment Temperature: -20~50℃/-4~122°F Protection Class: IP12D Remote Control Range: 15m/49ft Closing Force: 30kg/66lbs Noise: 55DB Gross Weight: 8.3kg/18.3lbs Net Weight: 7.4kg/16.3lbs Switch Size: 8.5*8.5cm/3.34*3.34in Control Panel Size: 11.5*11.5cm/4.52*4.52in Product Size: 51.5*8*9.5cm/20.27*3.15*3.74in Package Size: 68*15*26cm/26.77*5.9*10.23in Package Included 1 x Automatic Swing Door Opener 2 x Remote Controllers 2 x Switches 1 x Pull Arm 1 x Push Arm 5 x ID Cards 1 x Control Panel 1 x Sensor 1 x English RF Card Access Manual 1 x Chinese Installation Manual 1 x Chinese Sensor Manual All Accessories for Assembly   Notes 1.We have detailed installation diagrams and instructions to help you complete the installation ideally in the shortest possible time. Please carefully read the instructions provided to improve your user experience. 2.Please note that one set of products can only open a single door. If it is a double door, please purchase two sets. Please note that this product is not waterproof. If you need to use it outdoors, please bring your own rain cover.