Note: This link does not include backup power supply. If you need backup power supply, please contact the seller to buySpecification:blackMaterial: zinc alloy absWorking voltage: 6vBattery powered: 4 x aaa batteries, not included in the packageStatic power consumption: 5μaDynamic power consumption: 200maAccept the cabinet or door wardrobe thickness: within 30mmApplicable door: wooden door onlySize: 75*75*30mmType: Engine lockPackage Included:1 x Lock mortise (lock body) (without battery)1 x door bracket (side lock)2 x smart rfid ID card2 white cards1 x mounting screw bag1 x User Manualobserve:The lock will automatically unlock (open) before the battery runs out. Prior to this, the low battery warning will sound an alarm.So don't worry about being blocked. Configure the use of the management card and user card, and read the user manual for details.Instructions1: ResetInstall 2 x aaa 1.5v batteries. Press the reset button until a long beep sounds.2: Configure the management cardAfter resetting the lock, swipe a rfid/fob card. This first card is configured as a management card.3: Configure user cardSwipe the management card. Then slide the new card you want to add as the user panel during the beep.4: Delete cardDelete all user cards: swipe the administrator card 3 times. Delete all administrator and user cards: same as reset.Low voltage alarmWhen you slide the card to unlock, if the battery is low, the voice alarm will sound (you may hear a long beep). You can still swipe your card up to 50 times to unlock. Replace the battery as soon as possible.Light weight.