The Slingshot by BlueFlame is a Level-IPX4 waterproof speaker that can even be used in your shower. The speaker supports Bluetooth V2.1+EDR, A2DP, AVRCP, and HFP devices, and it produces “big, beautiful sound with increased bass response and sonic radiator technology.” It even has a microphone, so you can use it for hands-free calling with your Bluetooth-enabled phone. There are two Slingshot models available. The Slingshot Rechargeable has a rechargeable battery, as you’d image, and it can be pre-ordered for $119. The standard Slingshot uses 4AA batteries, and it’s available for $99.99. You can purchase directly from BlueFlame or at Verizon stores now; the Slingshot should be available at other retailers soon.