Wagu drum Fingerprint Door Lock Compatible for Smart Home 2-in-1 Fingerprint & Password Deadbolt — Mechanical Keys Included, USB Emergency Power for Indoor Wooden & Metal Doors 35–55 mm Combination Lock  (black)

Compatibility & Application: Designed for indoor wooden and metal doors prepared for a deadbolt; fits standard deadbolt cutouts and commonly used door backsets. Recommended for homes, apartments and offices. Core Function — Biometric & Code Entry: Primary access via fingerprint or password with mechanical key override for reliable everyday indoor door access. Features & Advantages: Semiconductor fingerprint sensor with fast recognition (≤0.2 s); supports up to 100 fingerprints and 100 password entries to cover family and shared use. Built-in doorbell and anti-burglary support for basic alarm linkage. Specifications: Material: aluminum alloy. Power: 4 × AA alkaline batteries (not included). Fingerprint capacity: 100; password capacity: 100. Fingerprint reader: semiconductor sensor; read time ≤0.2 s. Operating temperature: −20 to 60 °C. Includes 2 mechanical keys. Suitable door thickness: approx. 35–55 mm. USB charging port for emergency external power. Easy Installation & Use: Matches standard deadbolt dimensions for DIY or professional installation. Insert batteries, register an administrator fingerprint or password, test mechanical keys and locking/unlocking — ready for daily use.