Homgeek New Handle Intelligent Electronic Anti-theft Lock Digital Code Keyless Keypad Security Entry Door Lock Adjustable Latch Backset 2 3/8" to 2 3/4"

This is brand new digital code keyless keypad security entry door lock fitting both left and right hinged doors. Just use the existing knob lock hole for installation, no need to open another holes.
If the relatives are visiting your house or your neighbor & pet sitter need to enter your house, set a temporary code for their stay. No spare keys needed! 

Features:
Never worry about losing, forgetting keys, or making extra keys time and time again.
Auto-lock from outside in three seconds after entry to ensure maximum security.
Very easy to operate, suitable for office, house and apartment.

One-Key opening function (Passage Mode): Press any digital key to open the lock.
Easy to install or replace exit lock by any one.
Require 4 AAA 1.5V alkaline batteries（Not included).
Easy to replace batteries without affecting the information of passwords.
Fit in standard door knob installation hole with adjustable latch backset 2 3/8" to 2 3/4".
Free to add, change, or delete user codes.
The keypad has blue backlight when pressed, so you can see it in the dark. 
Service life of battery: approx 20,000 times (about 1 year, till the alarm while unlocking you need to replace the battery within 10 days).
Can store 1 group master code and 8 groups of user codes.
Encryption function for confusing any spies watching as the User code being entered.
Out emergency power supply opening function.
Alarm when the battery power is low.
American standard tubular latch. 
Free rotating handle is adopted to avoid unlock by violence.
 
Specifications:
Brand: Homgeek
Door Margin: 60-70mm (standard 2 3/8" to 2 3/4" backset)
Suitable for Door Thickness: 30-60mm 
Material: High Carbon Alloy + High Carbon Steel + Zinc Alloy
Color: Silver / Grey (Optional)
Style: Digital Code Keyless Lock
Door Open Direction: Both Left and Right 
Emergent Power Source: DC 6V battery
Battery: 4 * 1.5V AAA Battery (Not Included)
Static Current: ≤10uA
Dynamic Current: ≤400mA
External Escutcheon Dimension: 55mm
Internal Escutcheon Dimension: 82mm
Operationg Temperature: -15℃ - 65℃ / 5℉ - 149℉
Operating Temperature: 10%-95%RH
Installation Method: DYI Screws
Suitable Doors: Interior Door, Wooden Door, Ccomposite Door, Aluminum Alloy Door
Diameter of Handle: 5.5cm / 2.2in
Item Size: Approx. 19 * 8.2 * 10cm / 7.5 * 3.2 * 3.9in (L * W * H)
Item Weight: Approx. 1kg / 35.3oz
Package Size: 22 * 14 * 9.8cm / 8.7 * 5.5 * 3.9in
Package Weight: Approx. 1.2kg / 42.3oz 

Note:
Please read the instruction thoroughly before you install and use the lock.
Please retain this manual for future reference.

Package List:
1 * Lock Outside Handle
1 * Lock Inside Handle
1 * Installation Accessories
1 * User Manual