Arespark&reg; Bluetooth 3.0 speaker Wireless Outdoor Portable Speakerphone with Built-in Mic, Ideal for Home, Office, Sports & Biking Use (Blue) Shockproof Waterproof und Dustproof, Unique and compact ostrich egg fashion appearance slips easily into your bag for use on the go Simple design ,Bluetooth V2.1,Compatible with all Bluetooth enabled media players. Two 45 mm drivers, itll deliver the rich bass and sound quality that you crave. built-in rechargeable 1500mAh Li-ion battery, CE ,FCC,ROHS Certificated for using friendly to the enviroment. Fixing screw holes designed specifically for bicycle