The Wireless Keypad ( PN 050550 ) is an encoded radio keypad operating at 433,92 MHz.The best use of the product is on applications where an encrypted radio signal has to be used to control: gates, garage doors, rolling shutters, sun-blinds, anti-burglar appliances, lightings, etc. The code has a very high security coding system (19683 code combinations). The radio transmission is enabled only after the dialing of a security user code. There are up to 4+2 different channels that can activate up to 6 different receivers or relays. The internal memory can store up to 24 different security user codes and 1 Master code. The product fully complies with the European directives 89/336/CEE, 99/05/CE and Part. 15 of FCC Rules..