Miccus eXtreme SPX7: Waterproof, Floating, Bluetooth Wireless Stereo Speaker System (Blue/Gray) Totally waterproof, floating Bluetooth wireless speaker system (IPX7). Integrated loop - Easy to attach a hook, rope or tie down to secure the speaker in place. Built-in mic with noise cancelling technology for speakerphone use. Included handlebar mount - is perfect for all types of bicycle and motorcycle mounting applications. Uses micro USB to recharge the internal battery for up to 6 hours of playtime.