Specifications1. Bluetooth Version: 1.2/V2.1， wireless transmitter standard of class II2. Frequency Coverage: 2.402~2.480GHz ISM band3. Sensitivity: -80dbm4. Transmit Range: up to 10m5. Transmit Speed: 57~723Kbps6. Stereo Compression Ratio: 44.1/48kHz7. Channel: 79 channels of 1MHz， B/W8. Contact Terms: Point-to-Point9. Battery: Li-ion10. Charge Power : PC USB， 5V11. Charging Time: 1-2 hours12. Charge Power : PC USB， 5V13. Compatible: All of devices which is with the bluetoothWhat is included:1 x Sports Bluetooth Headphone1 x USB Cable for charging