The CyFi is a portable speaker available in a 2.4GHz version and an A2DP Bluetooth version. The Bluetooth version can function as a handsfree speakerphone. It has a rechargable battery and charges through a docking station. It can mount to your bike, boat, backpack etc, with the provided attachement. The only issue I see with it is the price. The Bluetooth version is $179.95 and the iPod version is $199.95.