How to Use: Please prepare 4 x AAA batteries before use. Download the APP recommended in the manual in advance. After installation, you can use the APP to bind the smart lock. For more usage methods, please read the manual carefully. Specification: Item Type: Smart Lock Material: Zinc Alloy Uses: Home, Apartment, Hotel, Bed and Breakfast Battery: 4 x AAA Batteries (without Batteries) Unlock Method: Fingerprint, Smart Card, Password, App, Key Fingerprint Capacity: ≤100 Number of Smart Cards: ≤100 Password Capacity: ≤100 App: TT LOCK Resolution: 500DPI Rejection Rate: ≤0.15% False Acceptance Rate: ≤0.00004% Package List: 1 x Door Inner Lock Body 1 x Outer Door Lock Body 1 x Cylinder 2 x Key 2 x Smart Card 1 x Square Bar 3 x Nut Tube 1 x Lock 1 x Lock Box 1 x Manual 1 x Opening Picture 7 x Screw Note: Batteries are not included in our list.