The sound signature is very well balanced from 50% to 95% volume and 95% volume is very loud indeed. He loves them and wears them around the house and outside when taking the dog out. iw377801 So far its a great headset. The bike sensor functions as it should and additional data is helpful but the sensor fell off during a ride and the mounting boot that the sensor sits in as lost. iw377801 Easy to sit in and didnt ride up or show your behind if you bent over, which was nice. iw377801 That said, these earphones are better than most single driver wired earphones I have. It got so cliche - I almost turned it off. Pressing combinations of buttons does nothing - it just stays red. iw377801 We finally did get the individual boxes together but linkage only worked on the first three boxes. Bought 2 sets just in case- no telli g about durability after a week, but the originals lasted 3 1/2 years.
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