Removed the gasket in the helmet and installed the speakers in the body and reinstalled the gasket. The speaker is too thick. I couldn't put the helmet on after installing the speakers. I can't say anything about the quality of the speakers or the battery because I can't put the helmet on after installation. So it doesn't matter how they sound. I give 1 star because it doesn't deserve it. They might sound good in a trash can, but I can't drive with a trash can on my head.
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