1、Adopt aluminum alloy panel + zinc alloy handle molding design, surface vacuum electroplating to prevent oxidation and discoloration, waterproof, durable and strong. 2、Support garbled unlocking to prevent peeping. For example, if your correct password is 666666, you can enter 12352+666666+11245 to open the door. 3、Support APP remote control, such as remote door opening, sharing temporary password and dynamic password, support password and ID card management. 4、Reversible handle, left/right opening door can be adjusted by itself, suitable for door thickness 35‑70mm / 4‑8in , no need to worry about failure to install. It can be directly replaced with a ball lock. 5、Powered by 4 x AA batteries, low power consumption, standby time of up to 20,000 hours, when the battery is exhausted, it will automatically sound the "didi" prompt sound, equipped with a USB emergency power port. 6、Support mobile phone Bluetooth door opening (within 0-15 meters) + swipe card to open the door + touch key password to open the door + mechanical key to open the door. The keyhole is not exposed to prevent any damage directly caused by illegal and safer. 1 x Pair of Door Lock(Battery Not Included)2 x Handle2 x Door Cards1 x Hex Wrench2 x Mechanical Key1 x Bag of Lock Tongue Accessories1 x Bag of Screw Accessories(5pcs small bags)1 x Instruction Manual Condition: 100% Brand NewItem Type: Smart Door LockMaterial: Aluminum Alloy+Zinc AlloyColor: As shown in the pictureSize: Approx.185x70x85mm/ 7.3x 2.8x 3.3in(L x W x H)Unlocking Method: Bluetooth App + touch keyboard + swipe card + mechanical keyApplication Name: For ttlockApplication System Support: For Android/iosLanguages: English, Spanish, French, Portuguese and more than 20 languagesLock: Single lockApplicable Door Thickness: 35-70mm / 1.4- 2.8inDoor Opening Direction: Left opening door/right opening door (self-adjustable)Bluetooth Version: 5.0Power Supply: 4 x AA batteries(Not included)Working Voltage: 4.5V-6VStatic Power Consumption: 15uADynamic Power Consumption: 25mAWorking Temperature: -20-65℃Weight: Approx.1915g/ 67.5oz