Woot offers JBL Wind2 Bluetooth Portable Carry-Along Handlebar Compatible Speaker & FM Radio for $24.95 (orig. $89.95). Free shipping for Prime Members.

Product Description:
JBL WIND 2 is portable speaker to be your music on the go, including on two wheels! With battery up 10 hours, it's IPX7 waterproof so you can keep listening rain or shine. Take your favorite stations wherever the day takes you, with station information on the scrolling LCD screen. Designed for any use including backpacking or bicycling, the included carabiner and bicycle bar mounter give you endless possibilities.

• Bluetooth, FM tuner and SD card slot

What's in the Box:

• JBL Wind 2 Bluetooth Portable Speaker & FM Radio
• USB charging cable
• Aux Audio cable
• Carabiner
• Handlebar Bracket
• Rubber mount 
• User manual