MASTERcode™ 2-channel micro transmitter with self-learning. The MASTERcode™ Access Control system is perfectly suited to automatic garage doors, barrier parking spaces, and automatic door openers with electric locks. It stands out for its simplicity of coding. It offers a great scope to the facilities. The range is complemented by an autonomous access control system that allows basic RFID key management. Requires 1 type 23A or similar battery (not included).