Domon&reg; Waterproof,Dustproof and Shockproof outdoor Power Bank Portable Shower Stereo wireless Bluetooth Speaker with CSR 4.0 &ndash;The Best Or Nothing! Designed By Domon&reg; in Germany-S400(Black) Power bank bluetooth speaker thanks to the Domon unique technology which BUILT-IN POWER BANK to recharge your smart phone or tablet. When you in hiking, or a long time in outdoor activities, the speakers and charging power supply combined, space saving, easy to carry. LONG LIFE BATTERY -Powerful 7000mAh 3.7v lithium ion rechargeable battery (USB port) that provides up to 20 hours of continuous playback and 200 hours standby time,Charge 10 times or more. Advanced bluetooth technology wireless bluetooth speaker is an incredibly powerful speaker featuring bluetooth with CSR 4.0 and a CSR8645 chipset that offers crystal clear sound and a longer, 10 meter bluetooth connectivity range. Waterproof, Shockproof and Dust-proof bluetooth speaker that provides protection from harsh environments such as the outdoors, rain and shower. Features a rubberized rugged rectangle exterior for ultimate impact resistance. High definition sound with SUB woofer crystal clear sound technology with a rich bass sound giving an impressive sub woofer effect to deliver the rich bass tones and superior sound. The speaker is compact and perfect for streaming music for personal use or parties and so on. Universal device compatibility works well with IPhone, IPod, Macbook, Samsung Galaxy S4/S5, Galaxy Note, Amazon Kindle Fire HD, Amazon Fire Phone, HTC One, Nexus 7, Nexus 4, Microsoft Surface plus Tablets, Smart Phones and PC's. We offer a 100 percent risk warranty ,Free one year guarantee on all Domon products for complete worry free buying.