Wireless Headphones - with microphone, behind-the-ear, closed construction, Bluetooth 4.2, with volume control, frequency range: 20 Hz-20000 Hz, battery life of up to 3 hr(s) Enjoy listening to music without annoying cables. Their ear-covering design ensures amazing insulation against background noise. The Denver BTE-110B Wireless Headphones use Bluetooth technology for wireless connection to your devices. Say goodbye to cables. With a frequency ranging 20 to 20000 Hz, you can enjoy knowing that you won't miss a single beat of your favourite song.   These wireless headphones are also equipped with a microphone built-in. These wireless headphones from Denver have 4.2 Bluetooth. The volume of your music can be adjusted using the control wheel. The battery life is 3 hr(s). Denver BTE-110B Wireless Headphones Key Features Material of these wireless headphones by Denver BTE-110B is closed Stylish grey colour Volume buttons Connection method: Bluetooth Wire-free...