Features: brand new and high quality for SMART INTERIOR DOOR-LOCK. Multiple unlock methods: fingerprint unlock, passwords unlock, and for key unlock. A kind of modern technological lifestyle, providing you more security and convenience. Widely used for home, office, homestay, apartment, B&B, hotel, and more. LEFT & RIGHT AVAILABLE. Both left handed and right handled doors are available. Easy to install in minutes. NO Wiring or NO Drilling required. Fit for majority interior doors of apartment, bedroom door, entry doors, homestay gates. BACK-UP for KEY INCLUDED. Package contains: 1 pair fingerprint lock; mouting kit; 2 mechanical keys; user manual. High quality zinc alloy doorlock, rust-proof, designed to last. ANTI-PEEP DESIGN. You can set 2 groups of virtual passwords before and after the right password, in for case of peeping. Upgraded designed, 360° full direction identification function of dry, wet and incomplete fingerprints. HIGH PERFORMANCE. Low porwer alarm. Usb interface is for incident happened that the for smart lock was power off, while it can be recharged by power-bank inmmediately. 4 gears sound volumes adjustable. The mute mode is for not disturbing your family when come back at midnight. Specifications: Color: Black Passsord: 100 Groups Fingerprint: 50 Fingerprints Recognising Time: 0.1s Language Support: Chinese; English; French; Spanish; Thai, Indonesian Power Supply: Battery; USB Charging Bettery: 4 x AAA Batteries (Not Included) Low Battery Current <150ma Low Battery Alarm: 4.3V Current: <30Ua Voltage: 6V Size: Approx. 14.6x6.4cm/5.74x2.51in Handle Width: Approx. 2.8cm/1.1in Material: Zinc Alloy Weight: Approx. 900g Package Includes: 1 Set Fingerprint Door Lock note: NOTICE: 4 AAA Batteries are not included in the package! Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!