Wireless Headphones - with microphone, True Wireless pits, semi-closed construction, Bluetooth 5.0, supports SBC, taking calls, with volume control, IPX4 certification, frequency range: 20 Hz-20000 Hz, sensitivity: 105 dB/mW, impedance: 32 Ohm, converter: 13mm, battery life of up to 22 hr(s) (4 hr(s)+18 hr(s)) Enjoy listening to your favourite music without cables. Their semi-closed construction will guarantee clear sound, which sounds spectacular. The DeFunc TRUE GO Slim Black Wireless Headphones utilize Bluetooth technology for wireless connection to your devices. Say goodbye to tangled cables. Using a frequency range of 20 to 20000 Hz, you can be sure that you won't miss a note of your favourite song.   These wireless headphones also include and internal microphone. These wireless headphones from DeFunc have 5.0 Bluetooth. The volume of your music can be adjusted using the control wheel. This model can even pick up calls. This model is totally wire-free, so...