For any of you who ride with partners, either ebike riders or regular bike riders, I just purchased a Sena R1 helmet. I have recently started riding with a friend and realized how difficult it was to communicate unless you were next to each other, so I started looking for devices that could be used for that purpose. The walkie-talkie headset devices looked useless. And then I found the Sena R1, and they work great. Four riders can be tied together, the sound is amazing, and once you learn how to operate the helmet you will, I believe, be very happy you bought it. The cost right now (Dec. 4, 2019) is $99.00 on Amazon, regular $129.00. You of course will either have to buy two and loan one to your riding buddy or convince him or her to buy their own. Reviews say the sound of music (yes it has FM radio) is tinny, I say it sure is not home or car sound quality, but it is not bad or unlistenable. It can also pair with your cell phone and you can make voice actuated calls and accept incoming calls. When using the intercom the sound and lack of outside noise is excellent. The helmet is also very comfortable. I and my friend have only used them twice now and we think they are great.