Waterproof Bluetooth Bike Speakers - Fits in Water Bottle Holder - Lasts 10 Hours - Satisfaction Guaranteed! Waterproof (IPX5) Speakers which will handle any shower and outdoor weather you can throw at our speakers! Bluetooth 4.0 Enabled! or Aux-IN Provides 10 hours of of Bluetooth streaming music on a full charge! Charge phone using 4200 mA built in battery while listening to music Answer Incoming phone calls!