Iwoo Sports Wireless Bluetooth Headphone Earphone Hifi Stereo Stero Headset for PC MP3 MP4 iPod Mobile(Green)
Bluetooth Version: 1.2/V2.1, wireless transmitter standard of class II    Frequency Coverage: 2.402~2.480GHz ISM band    Sensitivity: -80dbm    Transmit Range: up to 10m    Transmit Speed: 57~723Kbps    Stereo Compression Ratio: 44.1/48kHz    Channel: 79 channels of 1MHz, B/W    Contact Terms: Point-to-Point    Battery: Li-ion    Charge Power : PC USB, 5V    Charging Time: 1-2 hours    Charge Power : PC USB, 5V    Color: Blue