Keys, copied cards, and missed handoffs make doors harder to manage for families, rentals and offices. When guests or staff arrive at different times, delays and uncertain access records add stress. HOMCOM smart lock cylinder solves it with fingerprint, password, NFC card, APP and mechanical key entry. Features: 5-in-1 unlocking, less key burden: This keyless lock cylinder opens by fingerprint, password, NFC card, APP, or backup mechanical key. Faster, more accurate semiconductor fingerprint recognition helps family, tenants, staff and seniors enter smoothly Flexible remote authorization: The electric lock cylinder works with Tuya/Smart Life for nearby Bluetooth unlocking (max. control distance: 10 m). Send permanent, temporary, or timed codes, bind fingerprints/cards, and check opening records for contactless stays, rental access, and staff scheduling Wider door compatibility: This fingerprint lock cylinder replaces ordinary Euro mechanical cylinders on 35-50mm doors, with a standard 60mm cylinder and left/right-hand installation. The 4.2 x 4.2 x 16 cm body, black visible panel, and silver tone inner cylinder fit uPVC, composite, wood, or narrow-frame aluminium doors Low-battery alert and dual emergency entry: Powered by 3 AAA alkaline batteries (not included), this digital lock cylinder reminds you before power runs low. If power fails, use a power bank with USB-A to USB-C emergency supply, or open with the backup mechanical key to avoid being locked out Easy installation and maintenance: This electronic lock cylinder includes video guidance, size drawings, a screwdriver, screws and plastic/metal accessories for DIY replacement while keeping the original handle. The painted ADC12 aluminium alloy and ABS body, plus the electroplated copper cylinder, provide strong construction for everyday use Specifications: Dimensions: H:16 x W:4.2 x D:4.2 cm Weight: 0.6 kg Colour: Black Guarantee: 12 Months Material: Aluminium, Abs, Copper Model Number: B82-015V00BK