This hands-free set allows you to listen to all channels. Whether your mobile phone or your two-way radio – people can talk to you. For your full-face helmet the model HS-410 is most suitable. The microphone is fixed in the mouth area by Velcro. In your open face/flip-up helmet the flexible boom keeps the microphone in optimal speaking position. Both types are equipped with a 2.5 mm phone jack to connect the sets to your mobile phone. Possibly needed specific mobile phone adapters are available at any good electronic store.