HAIFUAN Electronic Touch Screen Code Lock, Unlock With Miafare Card, Code or Key. Very Coold Outlook, Touch Screen Unlock With Mifare Card, Code or Keys,130 users in total Consealed key, Both Suitable for Right Open Door and Left Open Door,Easy Converse Emergency Back Power Terminal at Bottom of Plate, video instructions available Press "#" 2 Seconds to Lock when you are outside or turn the knob to lock when you are inside Diameter of plate: 2.36&#034;(60mm)*5.39&#034;(137mm) Deadbolt with backset of 2 3/8&#034;(60mm) and 2 3/4&#034;(70mm) adjustable Perfect for front door and interior doors Well made Elegent and beautiful