The Centurion SmartGuard Air Wireless Keypad Black is a fully weatherproof wireless keypad designed to provide secure access control to restricted areas. It stores up to 1000 unique codes which can be up to 10 digits long. User codes can also be selectively deleted without affecting other codes stored in the memory. This makes administering your access control database so quick and easy. There are 15 separate channels, each able to be paired with any of the CENTURION code-hopping receivers. Such functionality caters for many different scenarios for example: a motorised gate entrance may be opened fully using one code, or activate the pedestrian opening using another, and switching on the house alarm using a third. The downcounter function allows a code to be used for a specific number of times before it expires and deletes itself from memory.