Best use where an encoded radio signal must control gates, garage doors, rolling shutters, sun-blinds, anti-burglar appliances, lightings, etc. The transmission is enabled only after the dialing of a security user code. There are 6 standard channels which can activate 6 different receivers or relays + 2 service channels for battery low and tamper-open transmission. Internal memory for 22 different security. User codes and 1 Master code.