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: 117 dB/mW, impedance: 25 Ohm, converter: 13mm, battery life of up to 12 hr(s) (4 hr(s)+8 hr(s)) Enjoy listening to your favourite music without annoying cables. Their semi-closed construction ensures clean sound, which sounds incredible. These DeFunc TRUE Basic Green Wireless Headphones are equipped with Bluetooth for wireless connection to your devices. Say goodbye to cables. Using a frequency range of 20 to 20000 Hz, you can enjoy knowing that you won't miss a single note of your favourite song.   The wireless headphones also have a microphone. These wireless earphones from DeFunc use 5.0 Bluetooth. The volume of music or videos can be changed with the control wheel. This model can even receive your calls. This model is completely without wires, so...