[Multiple Ways To Unlock]Advanced 4-in-1 Keyless Entry Smart Door Lock:Fingerprint + Anti-peep virtual password + Bluetooth for TTLock Eletronic + Key(2 include). Fingerprint Access,read your fingerprint,and unlock your door.It can auto relock your door for you so your home is always safe.[USB + Backup key,Double Assurance]Low battery alarm on Lock App(Free APP),with emergency power interface and backup key.When the power is critically low or the battery is completely drained,'t worry,use the backup key to open the door,-USB power bank also can be a temporary power supply.Never be locked out.[Applicable Range and Using Scenario ]The adjustable dead has a size between 60mm to 70mm,is suitable for doors with a thickness of 35-55mm.Simple Door Handle settings,suitable for scenarios,replaces standard single-cylinder U.S. door locks,fits both left and right,inner and outer.[Energy Saving Design]Only 4 AAA alkaline batteries (not included) can be used to power the door lock.4 batteries can be used about 8000 . It can work about 1 year. The low voltage reminder function can remind you to change the batteries. You can use android charging cable into the USB interface in the front of front panel to emergency unlock, the charging cable cannot be use as the charging tool. (No android charging cable in the package).[Modern Design and Durability ]: The door handle with keypad have an elegant silver design, which is made of alloy material, wire free, anti-corrosion, eek and modern. It is competent to both indoor and outdoor environments and great for house, apartment or other private spaces.Colour:blackMaterial: alloySize: 150 x 60mmPackage Contents:1 set x door locks2 x Mechanical Key1 x Mounting Kit1 x and English manualOnly the above package content, other are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.