Wireless Headphones - with microphone, behind-the-ear, closed construction, Bluetooth 4.2, track shuffle, taking calls, with volume control, frequency range: 15 Hz-25000 Hz, sensitivity: 101 dB/mW, battery life of up to 6 hr(s) Enjoy listening to your favourite music without annoying cables. Their ear-covering design ensures incredible insulation against background noise. These KOSS KSC/35 Wireless, Black Wireless Headphones are made with Bluetooth technology for wireless connection to your device. No more bothersome cables. With a frequency range of 15 to 25000 Hz, you can be sure that you will not miss a note of your favourite song.   These wireless headphones also include a microphone. These wireless earphones from Koss have 4.2 Bluetooth. The volume of music or videos can be adjusted with the control wheel. This model can even pick up phone calls. Songs can be switched easily and quickly using the controls. The package also includes a case for travel. The...