Bluetooth Speaker, Outdoor Portable Speakers with Glare crack The bluetooth working distance in within 10meter.Play music after pairing with bluetooth device,for example mobile/MID/TV. With HI-FI speaker,to sure the clear and bright quality sound.Support TF Card International advanced bluetooth chip and circuit design techniques,support all bluetooth device. With FM function,can search radio station broadcast automatically. Built in rechargeable battery for up to 4 hours play time at 70% of the maximum volume