With an IPX4 water-resistant exterior, the BOSS Marine Bluetooth portable speaker is the perfect audio device for all action sports and outdoor enthusiasts. The speaker is rugged, shock-absorbent, and is built for the outdoors and aquatic environment. Features NFC pairing for Android phones, auto pairing, audio streaming, hands-free calling, built-in microphone and track/volume control. Includes USB cable, 3.5mm aux-in cable, and Li-ion rechargeable battery. Powerful Bluetooth speaker provides output up to 33' away. 6-5/8" x 2-3/4".