... -20,000HzProduct feature of Wireless Bluetooth headphone1.Excellent sound quality , Mega Bass game Bluetooth headset with Noise-canceling ... of 2008. We are engaged ourselves in wireless and Bluetooth consumer accessory products, aiming to provide customers ... line ranges from over-head Stereo Bluetooth headset, Bluetooth headphone, Bluetooth earphone, Bluetooth speaker...etc.We have more than 5 years ...