Features: Dual core dual system, faster, more responsive. Two different ways to open and close, with the remote control and the spinning roulette. Easy and firm installation with the external mounting plate. Remote controls with digital conversation system, it cannot be decoded or duplicated. Long service life, made of stainless steel. Power saving mode and low battery consumption. Once the main batteries are depleted, you can operate the backup battery. The bottom panel design makes installation easier and firmer. The lock tongue and main parts are made of stainless steel, without fading. Suit in: office home hotel Anti-theft door Corridor door Wooden doors garage door and etc. Specification: Maximum distance of remote control: 10M (open distance can be farther). Power supply: 4AA batteries 1.5V+1 battery 23A12V. Unlocking current:100mA. Battery life: 4 batteries can last up to 16months in standby mode. Operating temperature: -20~70degree. Humidity between 20% and 80%. Dimensions:133 x 77 x 37mm. Note: About emergency opening. If all the controls are lost or the lock cannot be opened with controls, there is an emergency opening mode. When installing the lock, note the place where the emergency opening point is located. In case of needing to use the emergency opening, a hole of 3 to 4mm must be drilled in the door where the emergency opening is located. Once the drill is done, use a screwdriver to turn the screw and open the lock. Package includeds: 1 x Lock body (without battery). 1 x Lock body bottom pinch plate. 1 x Latch seat (Inside door, outside door can be used). 4 x Remote control. 1 x Instructions. 1 x Screw pack. 1 x 23A 12V battery