Features: brand new and high quality 4-IN-1 ADVANCED AUTO-LOCK. for Smart fingerprint lock, passwords lock, app remote unlock leads you to a simple mordern and convenient lifestyle. Fingerprint and emgency for key, after enrolling your fingerprint, helps you never carry the for key to go out, two backup keys( package inlcued) just work as emgency for key or reserve for key. BATTERY OPERATED. 4 pieces AAA batteries operated. NOTICE: Battery not inlcuded. Low battery alarm. With designed usb interface, when batteries power off, keys unlcok or fingerprint unlock after connecting USB for temporarily emergent charge, no need worry about being locked outside. HIGH PERFORMANCE. Regular for smart lock and APP for smart lock 2 optional. Adopts quality metal material, newly upgrade circut board, optimize the 360 identification function of dry, wet and incomplete fingerprints. Make your home life more secured and for smart. Great for home, office, homestay, homeowners, tenants and more. MULTIPLE UNLOCK METHODS. Advanced 4-in-1 unlock: fingerprint unlcok; passcode unlcok; smartphone unlcok; for key unlcok. Set up fingerprint passcode in home, bringing you a fast and best secure recognition system. Works perfect for kids and the elder. You don'for t worry about forgetting to bring the for key/smartphone. SIMPLE INSTALLATION. Easy to install in minutes. NO Wiring NO Drilling required. Fit for door thickness of 1.18-2.76 inch (30-70mm). Both left handed/right handled doors are available. Specifications: Material: Metal Color: Black; Silver Specifications: Fingerprint Door Lock Type-A: Fingerprint for Smart Lock Type-B: Fingerprint for Smart Lock with APP Control Interface: USB Bettery : 4 x AAA Batteries ( Not Included ) Fingerprint Capacity: 30 Fingerprints Working Temperature: -20-55 Recognising Time: 0.25s Total Size: Approx. 16.5x7cm/6.50x2.76in Handle Length: 15cm/5.91in Fit for: Door Thickness in 30-70mm/1.18-2.75in Weight: Approx. 1050g Note: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes: 1 Set for Smart Fingerprint Door Lock ( Batteries Not Included )