A Channel-Check PLUS module is available as an option for the COCKPIT SX. When you switch the transmitter on, Channel-Check tests the set RF channel; if it detects that the channel is already in use, it alerts the user and – in the interests of safety – prevents the transmitter radiating an RF signal. This avoids crashes caused by channel clashes (two transmitters on one frequency), and constitutes a real step forward in model sport safety. The Channel-Check PLUS module can also be used to check all channels on its frequency band (Scan function). Channels in use are displayed with an indication of field strength. Installing the unit is very simple: once the transmitter back has been unscrewed, the Channel-Check Plus module is simply pushed into a dedicated socket.