How to Use: Install the accessories, download the app, press # to wake up the screen, and you can use it (read the English manual in detail). Specification: Item Type: Smart Door Lock Material: Aluminium Alloy Product Color: As Pictures Shown Password Panel Size: Handle Length: Approx. 14.2cm / 5.6in Small Panel Length: Approx. 5.7cm / 2.2in Product Weight: Approx. 909g / 32.1oz Battery: 3 AA Batteries (not included) Enable Screen: Press # to Wake Up the Screen Working Temperature: -20°C~+65°C Power Supply: 3.5V-4.2V Emergency Power Supply: UBS Interface 40 Fingerprints: 1 management fingerprint, 39 ordinary fingerprints Password: 6-8 digits, 240 groups Function: Fingerprint Unlocking, Password Unlocking Applicable Door Thickness: 30-60mm / 1.2-2.4in Scope of Application: Suitable for indoor wooden doors / household doors / homestay doors Package List: 2 x Door Lock Panel 1 x Lock Tongue 1 x Door Buckle 1 x Stopper 1 x Square Bar 1 x Screwdriver 1 x Bag of Screw Package (11 accessories in total) 1 x English Manual