1,4 in 1: Smart lock provides you with 4 safe and convenient ways to unlock immediately, for tuya APP, fingerprint, touch screen password andmechanical key. Supports a maximum of 200 fingerprints. 2,Multiple Password: You can set a variety of password combinations through for tuya app, can set temporary passwords, one‑time passwords, and phase passwords as required. 3,For Tuya App: You can check all operation records except keys in real time for tuya App to know who has been to your home at any time, can also view the battery status on the app. 4,High Quality Material: Smart door lock is made of high quality stainless steel material, rustproof, sturdy and durable, with an intuitive OLED display for easy operation and long service life. 5,Battery Alarm: Automatic smart lock will sound an alarm if the battery is low, can charge your safety lock temporarily from a portable power supply, phone charger, or any power source with type C port. 6,Wide Application: Easy to install, suitable for most standard residential doors with thickness of approx. 35‑50mm or 38‑97in, ideal for home, office, hotel, apartment, etc. 1 x Front Lock1 x Rear Lock1 x Lock Core Protection Tube2 x Single Tongue Lock Body1 x Lock Tongue Gusset Plate1 x Lock Tongue Gusset Plate Inside Box1 x Close Plate6 x M4 Joint Pin7 x Screw4 x Key1 x Screwdriver1 x Bore Hole Drawing1 x User Manual Item Type: Smart LockMaterial: Stainless steelColor: BlackBattery Type: 4 AA batteries (not included)Unlock Method: Bluetooth App, fingerprint, password, mechanical keyApplicable Door Thickness: Approx. 35-50mm or 1.38‑ 1.97inMounting Hole Standard: Diameter approx. 45-60mm or 1.77- 2.36inNumber Of Password Groups: More than 100 setsNumber Of Fingerprint Sets: More than 200 setsFingerprint Reading Speed: ≤ 0.5 secondsEmergency Power Supply Port: Type-c charging portScope Of Application: Very suitable for home or office or hotel or apartment door lock Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.