DIVOOM Voombox-ongo Portable Ultra Rugged and Water Resistant Bluetooth 4.0 Wireless Bicycle Speaker with Speakerphone Color Black Voombox-ongo uses Bluetooth 4.0 to wirelessly stream Hi-Fi audio anywhere you go from your smartphone or other device. Rugged design, splash resistant and built for the outdoors. Enjoy 3.5 Watts of Audio output per channel with full-range listening experience. Utilize the built-in Waterproof microphone and enjoy hands-free calls anywhere in your home, office, car and even on your outdoor weekend adventure. Built-in Standard Camera Style threading mount, 1 pc of strong bike mount is included.