PulseCode Security
PulseCode is a new, highly secure lock technology that breaks with traditional keyhole or wireless models of visible locking mechanisms.

Utilizing PulseCode technology from Master Lock, lock opening codes are transmitted to the invisible lock, through solid material, via unique combinations of discrete knocks from a small hand-held device. The PulseCode Master Lock 'listens' to the code and releases the locking mechanism if the code sequence is authorized.

The unique PulseCode technology means no more keys or combinations. All locks are now keyless and wireless... and invisible from the entrance exterior.