1、Support Bluetooth APP to remotely control the switch status of the lock, support fingerprint unlocking, password unlocking, mechanical key unlocking and card unlocking. 2、With a biometric semiconductor fingerprint head with a resolution of up to 150x150, fingerprint recognition is efficient and accurate, and the response time is short. 3、Virtual password design, you can enter the virtual password before and after the valid password, effectively preventing others from peeping. At the same time, you can generate time‑limited passwords to share with your friends. 4、Support mechanical key unlock function, with automatic sleep low power consumption mode, low battery prompt and USB emergency power supply interface for power supply. 5、High‑frequency encryption card, not afraid of degaussing, compact and light, easy to carry. The card can support up to 100 users to share the experience. 6、Remote control plus gateways, compatible with for Amazon and for Google Home intelligent voice control system to realize voice unlocking. (Voice and APP remote control need to purchase a gateways by yourself, the gateways does not include). 7、Zinc alloy surface, and the lock cylinder is made of stainless steel lock body, which is durable. The length of the nut with multiple degrees of fit meets the installation requirements of most scene door designs. 1 x Front Lock Panel1 x Rear Lock Panel 2 x Black Rubber Sleeve2 x Card1 x Single-Bolt Lock Body2 x Key1 x Lock Box1 x Lock Catch1 x Installation Accessory Pack 1 x Positioning Paper1 x Manual  Item Type: Smart LockMaterial: Zinc AlloyUnlock Method: Fingerprint, password, swiping card, Bluetooth APPFingerprint Capacity: 200pcsCard Capacity: 100 cardsPassword Capacity: UnlimitedWorking Voltage: 4.5V-6VPower Supply: 4 x AA alkaline batteries (not included)Applicable Door Thickness: Approx. 35-55mm/ 1.4- 2.2inSingle-Bolt Lock Body Center Distance: Approx. 60mm( 2.4in)/70mm( 2.8in) (Adjustable)