The RADIUM R1, R2, R2T and R4 remotes are one, two, and four-button keychain-style transmitters that operate at 433.92 MHz. They are designed to control automatic closing and anti-burglar systems thanks to their high security coding system (KeeLoq® Hopping code). The code sent by the transmitter changes at each activation, avoiding any risk of being scanned or copied. A special algorithm allows the transmitter and receiver to remain synchronized. The transmitter can also be equipped with a passive tag (see table for reference). The transmitter’s CR 2016 lithium batteries have a shelf life of approximately six months. These products fully comply with Part 15 of FCC Regulations and the European Directives 2006/95/CE, 2004/108/CE, 99/05/CE.