Azustar’s RockTube ($69) is a wireless, splash-resistant, dust-proof speaker for the iPhone that acts as a hands-free speakerphone, audio speaker and portable battery charger. It is water-resistant up to the IP54 standard, and works with all Bluetooth 2.1 devices.
The RockTube promises up to 15 hours of talk time or music playing time, as well as 1,000 hours of standby time. Unusually tiny for a Bluetooth speakerphone, it is made of aluminum for durability, and has a 2-Watt amplifier.
The Rocktube also comes with a variety of accessories, including a wrist strap and a mount for handlebars.