Great on-the-go convenience, perfect for camping and hiking! It boasts a rechargeable battery (up to 4 hours run time) and wireless Bluetooth (33' range) to transmit audio from compatible devices. PLUS: it plays MP3 files from both USB and SD card, broadcasts FM radio—and even includes a flashlight. With a built-in mic, it lets you answer calls too. Comes with charging cable and carrying cord. 3" diam. x 7" h.