Keyfree at a glance The remote control keyfob works up to 10 meters away. Keyfree is designed to work with the latest multipoint locking technology from Yale. The Keyfree number pad lights up, so it's easy to enter your code at night. Keyfree is also fitted with a mechanical lock and key as a safety over-ride feature. Keyfree needs no complicated wiring, just four AA batteries and Keyfree tells you when the batteries are running low. Keyfree has its own built-in 80 decibel alarm.