Description:  Smart Digital Door Lock Battery Powered APP Touch Password Keyless Latch Security Lock.    Features:  - Suitable for categories: wooden doors / copper doors / iron doors.  - Made of aluminum material, anti-corrosion and durable.  - With APP unlock, password unlock and IC card unlock.  - 4 x AA batteries(not included) powered, easy to install.  - Passage mode - when you need to open/close the doors frequently.  - Low battery alarm - when the voltage is lower than 4.8V, the alarm is activated each time with the unlock, and the lock could be unlock 200 times after the first alarm.  - Scramble code function - it supports front and back dummy passcodes to prevent from peeking.  - Lock function - Except for the administrator, any other users can not unlock the door.  - Access records query - you can check access records at anytime by APP.  - USB emergency interface - you can charge the lock to unlock the door when the battery run out.  - This smart lock supports application scenarios such as commercial office apartment building, tenement and bedroom.     Specification:   Material: Aluminum;  Color: Black, Silver, Coffee, Gold;  Power Supply: 4 x AA Battery(not included);  Unlock Mode: Passcode(150Pcs), Card(200Pcs), APP, Bluetooth;  Fingerprint: NO;  Scramble Code: 16 digits in total;  Work Temperature: -40℃~70℃;  Button Type: Capacitive touch button;  Suitable for door thickness: 35-60mm;  Lock margin: 60mm;  Overall Size:(Dia.)X(H) 6.2x17.8cm /2.44"x7.01"(appr.).    Package Included:  1 x Door Lock,  1 x Lock Core,  2 x IC Card,  1 x Mounting Kits Set,  1 x English User Manual,  (excluding other decorations).