• Capacitive touch screen • 4.8V low voltage alarm • Keyless entry providing enhanced security. 3 Unlock options: code, mifare cards, and mechanical key. • Code can be modified users, can set one administrative code, 50 normal codes. • Can be used with doors that are either right hand open or left hand open. • Standard single latch, length : 60mm • Easy installation, driven by 4pcs AA (not included). • Available Door Thickness: from 35mm to 60mm • Zinc alloy lock panel and handle • Package Contents: Door Handle with Plate, Latch, Strike Box, Strike Plate, Screws, Cylinder, Mechanical Key x2, Card x 5 , English Instruction Manual • Packing: 1set/box • Color: Brush Nickel The 3 in 1 keyless lock is the perfect commercial lock for businesses that need access for multiple people. It has 3 unlock options: access codes, inductive mifare cards, and mechanical keys. Can be used 200 independent mifare cards and 50 independent codes, the ability to quickly add or delete each user individually, this lock makes it easy to manage access for different groups of people such as employees and contractors, guests and house keepers. It is weather resistant making it a great lock for exterior or interior doors. You can give temporary codes to guests, visitors, house keepers or employees -- perfect for working place, hotel, school, and apartment. Logistics restrictions, packaging does not contain batteries, (customers need to buy four batteries No. 5)