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 tangled cables. Their ear-covering design guarantees flawless insulation against ambient sound. These Denver BTE-110g Wireless Headphones are equipped with Bluetooth for wireless connection to your device. Say goodbye to bothersome cables. Using a frequency range of 20 to 20000 Hz, you can be sure that you won't miss a single note of your favourite song.   These wireless headphones also have a microphone built-in. These wireless earphones from Denver are equipped with 4.2 Bluetooth technology. The volume of your music can be changed with the control wheel. A fully charged battery will last you 3 hr(s). Denver BTE-110g Wireless Headphones Key Features Material of these wireless headphones from Denver BTE-110g: closed Beautiful blue colour Volume buttons...