Wireless Headphones - with microphone, earplugs, closed construction, Bluetooth 4.2, track shuffle, taking calls, with volume control, frequency range: 20 Hz-20000 Hz, sensitivity: 89 dB/mW, impedance: 16 Ohm, converter: 10mm, battery life of up to 4,5 hr(s) Enjoy listening to music without annoying cables. The Swissten wireless headphones have a popular discreet and compact plug design. Their ear-covering design ensures flawless insulation against background noise. These Swissten Active Red Wireless Headphones use Bluetooth for wireless connection to your device. No more bothersome cables. Using a frequency range of 20 to 20000 Hz, you can be sure that you won't miss a beat of your favourite song.   These wireless headphones even include a built-in microphone. These wireless earphones from Swissten are made with 4.2 Bluetooth. The volume of music and videos can be adjusted using the control wheel. This model can even receive your calls. Songs can be switched...