I have a walkie-talkie set supposed to allow bike-to bike communication, but both loudspeakers and microphones are useless above 30 kph. You get what you pay for. We are required to have communication while practicing, but since the quality was so annoying and the mic and speakers tended to fall out, we've just ignored them. However, having the ability to speak and explain stuff to the kid while we ride is something I miss. As I see it, I have several options: 1) Use the mobile phones. We can call each other free of charge as much as we want. Range is usually great, but it can be a PITA if the call is dropped. Will require good bluetooth stuff to work. 2) Buy bluetooth intercom. Reviews vary. Seems you either must carry big lump on helmet or some wires, but I haven't checked much. 3) Radio transmitters. AFAIK, needs wires, but range and sound seems to be better than bluetooth stuff from Autocom(?) equipment. 4) I can get digital VHF radios of the sort used by the emergency service. Great range, and since they are stationary models wired to the bikes they will never need charging. But they do not come with bluetooth, so I will need to push a button to talk and I will also need a wire to connect mic and speaker to the unit. Which I really do not fancy. The ideal for me mic/speaker would be a small unit I could put in my ear that connected to a stationary radio on the bike in a wireless manner and voice activation. But whatever I get, I feel it should A) be wireless up to the helmet and B) hands free operated and C) offer great sound at all normal speeds and D) have a range of at least 300 metres. What would you recommend?