SMARTCODE is a keyless entry deadbolt that offers the ultimate in convenience, security, & style for every home. It easily replaces existing door hardware & is ideal for exterior & interior doors. SMARTCODE is loaded with a ton of customizable features to meet your needs including: – Two Access Code capability (4 8 digit combination) – Back lit key pad for increase visibility at night – One touch locking button (with a motorized deadbolt) – SmartKey Technology (highest pick resistance lock available & also allows the homeowner to rekey their own locks in seconds). – Automatic Door Locking function – LED locked or unlocked indicator – Audio beep when pressing buttons – Low battery indicator – Audible alarm sounds if 3 consecutive incorrect codes are entered – Automatic Deadbolt direction determination (door handing)