EVIZIAN Waterproof Bluetooth Speakers, with 4800mah External Battery Power Bank and LED Flashlight on Bicycle, Rugged Dustproof Shockproof Cubic Wireless Bluetooth 4.0 Creative design:waterproof, anti-shock, skid resistance wireless Bluetooth speaker. Perfect for listening to your music in outdoor activities like business trip, traveling, camping, hiking, or just around your house for showering or rafting. Powerful 4800mAh built-in lithium battery provides up to 35 hours of playing time, a standard USB port can be used as an external battery to charge your phone, which you can enjoy your music the same time power your electronics. Built-in 3 mode LED flashlight (bright/average/SOS), prefect for outdoor and emergency usage.Uique bike mount design for bicycle carrying, perfect to enjoy music on the way. Advanced Bluetooth 4.0 Technology- Ultra-optimized version of Bluetooth that consumes less energy and delivers crystal clear sound.With this unit, you can switch songs and adjust volume from up to 33 feet. Package included: Kmashi Arma K1 Waterproof Bluetooth 4.0 Speaker + Micro USB charge cable + User guide + 1 Year warranty + Friendly Customer Service.