"Features Wirelessly listen to music with integrated Bluetooth technology In fashion design, let the music surround your life at any time. Hands-free function, truly free your hand. Set-in rechargeable Li-ion battery, long stand-by, and working time. Product Details Frequency: 2.402GHz-2.480GHz Range: 10-15 meters(depending on devices) Transmission distance of microphone: 1 meter Li-ion battery: 3.7v/ 500 Ma Charging voltage: 5V Standby time: 240Hrs Charging time: 3 Hrs"
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