Features:x Dual core and dual system, open faster, response quicker.x Two different ways to open and close, with the remote control and the spinning roulette.x Easy and firm installation with the external mounting plate.x Remote controls with digital conversation system, it cannot be decoded or duplicated. Anti-theft and bring you safety.x Made of stainless steel, provide long service life, very strong and steady. Power saving and low battery consumption.x Once the main batteries are depleted, you can use the backup battery, no worries about dead battery and be locked outside.x The bottom panel design makes installation easier and more stable.x Ideal for office, home, hotel, anti-theft door, corridor door, wooden doors, garage door, etc.Specifications:Remote Control Distance: 10m or 32.8ftPower Supply: Power Supply: 4x 12V 27A Battery for Remote Control (included), 1x 23A 12V Battery (included) and 4x AA Battery (Not Included) for Door LockUnlock Current: 100mAhBattery Life: 4 batteries last for 16 months in standby modeWorking Temperature: -20-70Working Humidity: 20 percent -80 percent Lock Tongue Moving Distance: 23mm or 0.90inMaterial: Stainless SteelPackage Size: 23.0x17.0x6.5cm or 9.05x6.69x2.55inPackage Weight: 1056g or 37.24ozPackage List:1x Door Lock1x Bottom Gusset Plate1x Door Bolt Holder1x Screw Kit1x 23A 12V Battery4x Remote Controller1x English-Chinese User Manual