There is a declaration in the specifications that the operating time is six hours. Truly get the job done in under an hour and a half with a sound that is not at all loud. They provided an answer there, and according to the description, they worked on testing for a total of three hours and fifteen minutes after I turned them in for warranty service (I had purchased them on Amazon). This is not the case at all. Extremely dissatisfied with the purchase, which was not inexpensive, and also dissatisfied with the warranty service, which did not resolve the issues with the marriage. The headphones are wonderful in every way but those two exceptions.
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