Sleep Headphones, Bluetooth Sleep Mask with Ultra Thin Speakers, Sleeping Headphones for Side Sleepers Insomnia Meditation Travel, Gray

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Specifications Bt Version:V5.0 Frequency:2.402 Ghz-2.480Ghz Transmission Range:20M/66FT Rated Power:RMS 10mW2 Speaker Unit:32Q/20mm Battery:3.7v......