Experience remarkable audio with the boom BOTTLE+ Rugged Wireless Mobile Speaker that fits right inside your bicycle water bottle cage or cup holder on a boat. boom BOTTLE+ is designed to bring entertainment to the outdoors. This wireless Bluetooth mobile speaker is weatherproof and durable, allowing you to take your music virtually anywhere. Includes micro USB charge cable and single 12 watt USB wall charger for the fastest charge possible. Powerful 6000mAh rechargeable Lithium-ion battery provides up to 11 hours of play time or allows you to fully recharge your USB powered device up to 3 times at 2.1 Amps. Dual Pairing Capability- for true stereo sound. Dual Pairing Mode will allow one speaker to act as a Right Channel and the other as a Left Channel, or both speakers can output in stereo sound.