The Yale YRD136 is a key-free keypad deadbolt with Z-Wave Plus built in. It replaces a standard deadbolt in minutes using just a screwdriver and can be added to dozens of Z-Wave smart home and alarm systems with one-touch enrollment. The lock is 100% key free so it can't be picked and there are no keys to lose. To prevent lockouts due to dead batteries, there is a 9V battery terminal located below the keypad. The lock has a backlit keypad that wakes with a touch and has numbers that won't wear off.