Ebay offers Altec Lansing HydraMotion Bluetooth Speaker for $14.99 (reg $49.99) with free shipping.

Product Description:
The HydraMotion EverythingProof Wireless Speaker is super portable and gives you big, 360 sound - anywhere! With 12 hours of battery life, the music will never end. The HydraMotion is IP67 Everything Proof - this speaker is super durable and will outlast anything thrown at it! A carabineer clip allows the speaker to be clipped or hung from your backpack, duffle bag, or outdoor awning. 11 Built-in LED light modes beat, strobe and pulse to the highs and lows of your music. Pair two HydraMotions together via True Wireless Pairing for double the sound!

• Dimensions (Overall): 5 Inches (H) x 3.25 Inches (W) x 3.25 Inches (D)
• Weight: 1.25 Pounds
• Estimated Charge Time: 5 Hours
• Electronics Features: Rechargeable Battery, Waterproof, Outdoor Use, Bluetooth, USB Chargeable
• Connection Type: No Wired Connection Ports
• Operating System Compatibility: Apple iOS, Android
• Wireless Technology: Bluetooth
• IP rating: IP67
• Maximum Battery Charge Life: 12 Hours
• Battery: 1 Non-Universal Lithium Ion, Required, Included