Wireless Headphones DeFunc TRUE GO Slim Black:Enjoy listening to your favourite music without annoying cables. Their semi-closed construction will guarantee perfect, clean sound, which sounds spectacular. These DeFunc TRUE GO Slim Black Wireless Headphones use Bluetooth for wireless connection to your device. Say goodbye to bothersome cables. With a frequency range of 20 to 20000 Hz, you can be sure that you will not miss a note of your favourite song.   The wireless headphones also have a microphone built-in. These wireless headphones from Garmin Czech s.r.o. are equipped with 5.0 Bluetooth. The volume of your music can be changed with the control wheel. This model can even receive calls. This model is completely wire-free, so they are true wireless headphones. The package also includes a case for travel. These DeFunc TRUE GO Slim Black have a water resistance of IPX4. A fully charged battery will be able to last you 22 hr(s). DeFunc TRUE GO Slim Black Wireless Headphones Key Features Material of these wireless headphones by DeFunc TRUE GO Slim Black: semi-closed Stylish black colour Volume buttons Connection method: Bluetooth Wire-free connection with Bluetooth allows for ultimate freedom Battery life: 22 hr(s) These Garmin Czech s.r.o. wireless headphones have a microphone also Every user is sure to like the included microphone. The microphone on these Garmin Czech s.r.o. wireless headphones ensures uninterrupted voice calling with your friends and family. It is built right into the wireless headphones.