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Bose Frames Rondo is sunglasses with integrated speakers. The Bose miniature speakers are precisely positioned so that sound can be heard by you, not by others. In this case, the acoustic design is open, you will not be isolated from your surroundings. The eyeglass frame is scratch resistant. Glasses are also protected from cracks and scratches to withstand life on the move. Glasses block up to 99% of UVA / UVB radiation. Glasses have several variants of shape and microphone to answer calls. Bose Frames Rondo can work for 3,5 hours when playing music and for 12 hours in standby mode.