One week's worth of listening can be had out of a single charge for the headphones and a carrying case. When you ride in one of the older subway cars, the ambient noise from the outside world is muffled almost completely, and no one else in the car can hear what you are listening to. The price is too high, but I was able to get it at a discount, so it didn't bother me too much. There are brief interruptions in communication on occasion, but they are resolved immediately (while using t110bt, the interruptions were more obvious, and the music "lags" occasionally).
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