Mounted it on a HJC I-70 helmet (integral with speaker cutouts) and drove a Harley Sportster with V&H exhaust. I can hear things fairly well at all speeds, although the music is a bit distorted at highway speeds. Navigation is good at all speeds. Easily and securely sync to my Android 8/9 phone. The battery life is amazing. Came charged at 1 bar on a full charge, I charged an hour before use and it was still at 1 bar on a full charge and have used it for about 8-9 hours so far in the Texas heat, mostly idling with no music, navigation or Calls active (but I was reachable by phone) and it's still 1 bar when fully charged. As other reviewers have pointed out, the clip is a bit cheap. However, proper installation helps. It took a bit of effort to position it correctly so the clamp wasn't tight or something and it works great after spending 5 minutes on it. This helmet has an internal sun visor with a sliding mechanism to operate it from the left side on the bottom of the helmet, so I had to adjust it a bit further back, it's mostly behind my left ear. When I remove the helmet, the device bounces up and wobbles slightly from its fully seated position in the clamp (the table barely makes contact with the device in front of the helmet), but a little care with installation is all it takes. In general, that's good. I didn't want to pay the price for greatness, so goodness was expected. It didn't disappoint. I only have one device and I'm traveling alone, so I can't talk about intercom features, but I'll be buying another one for two-person communication soon.
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