Compatible with Yale Unity Series With the Yale Smart Keypad you can lock and unlock your door via PIN codes. Control Access Create and send guests unique entry codes with the Yale Access app. 220 PIN codes Enter up to 220 user PIN codes One touch locking Save time and lock your door with just a touch. Hassel free installation. No hard wiring Installs on your door in just a few minutes. 100% battery-powered, no wiring needed.