Bluetooth Speakers with Power Bank Wireless Waterproof & Rugged. PHI Sports and Outdoors Offers the Best Portable Hands Free Universal Marine Speaker Ever. Enhance your Outdoor experience now!! HIGH QUALITY BASE & SOUND: You will be surprised by the powerful base that is produced by this speaker. Say goodbye to background noise. PORTABLE WIRELESS BLUETOOTH: Don't be tied down with wires. Enjoy your freedom and music. Connect to any device with Bluetooth capability. Also it come with a clip witch makes it very portable. You can hang it from you bag while hiking. You can plug into a boom box with 3.5mm jack cable aswell. WATERPROOF & RUGGED: This speaker is tough and Built with rubberized, rugged exterior shield that protects it from the environment. You can drop it and run water over it. It's perfect for the outdoors. BUILT-IN MICROPHONE: This speaker has a built-in microphone. It can be used to make and receive phone calls. POWER BANK: Double the function, double the value. Powerful 5000mAh built-in polymer lithium battery provides up to 20 hours of playback time and 200 hours of stand by. It can charge most Smart-phones twice. PARTY ALL NIGHT and never run out of POWER. You can recharge it over and over again and it will ALWAYS last. We offer a LIFETIME BATTER WARRANTY. If you feel that you don't have the Highest quality Bluetooth speaker available return it for a full 100% MONEY BACK.