Ismart Stereo Wireless Headset BX9

This headphone is called the Wireless Bluetooth Headphone with Computer Connector. This is a very special headphone because it allows you to listen to music without the need for a cable. You can also use it to listen to the radio or to make phone calls. 40mm neodymium magnet stereo field, High frequency sound JL chipset support wireless 5.0 250mah battery gives 7hours music Over-ear design protect ears metallic patting LED light with on/off switch, foldable, easy to carry Four key controls Wireless version 5.0 Input Rate : 5.0V - 1A, Multiprotocol wireless, Frequency response 20Hz- 20KHz, Impedance 32, Sensitivity 80dB.