Antenna for receivers Motion Line with bus-L communication or as interface for receivers DCS with bus-S communication. By connecting to a bus, multiple antennas can be used in one installation, giving you a greater range. With the FREE hands-free access control system, Activa Go offers the possibility to work with groups, even if the receivers are close together. Can also be used to expand the former 433 MHz JCM receivers with the new GO 868 MHz transmitters.