I always use these interphones like this: full face helmet, earplugs in, 60 to 65 mph most of the time and I can easily hear my riding partner (my wife) about 90% of the time. We get separated by several vehicles and quite a bit of distance and can still easily hear each other. It's quite impressive! I have been disappointed with the battery life as mentioned by others. I think they seem to last about 3 to 4 hours if we keep them on all the time. There is no way to charge them on longer trips other than plugging into a wall for a few hours. I would at least like to see some sort of motorcycle battery or double-A battery charger solution for this problem. My wife uses hers with her phone and it works great for that. I saw that phone mode lasts longer. Maybe if we both use our phones and call each other, we could stretch it out to closer to the 10 hours "phone time" advertised. I haven't tried that.