DOLIROX Bluetooth Wireless Sport Running Walking Polar Fleece Headband Hands Free Phone Call answering Ears Free Music Headwear With Built-in Stereo Speakers and Mic (Black) Material: Polar Fleece. It is good for Sports, Running, Riding a Bike, or Skiing using this magic Headband, it would absorb the sweat; helps keep the sweat out of your eyes, also can be used as the hairlace to keep your hair away from your eyes during the sporting while you can enjoy your favorite music at the same time wirelessly. Make you look so Cool. It is the best gift for the people who likes sporting or the Music Buffs. You would also use it as the eye blinder when you are sleeping or having a Nap while you would like to listening to the music. Bluetooth Version V3.0 +EDR. Compatible with all Bluetooth devices Built in rechargeable Li-Ion battery provides up to 4 hours of playtime. (USB charging cable included) Built-in microphone allowing you to talk hands free, with removable speakers which you can wash the headband after using