"POWKER" Bluetooth V4.0 Wireless Stereo Waterproof Outdoor Shower Speaker ,20 hours Play Time with USB Power Output (BLACK) Bluetooth V4.0 with 2*5W insanely loud super bass speaker, no pin needed for pair Waterproof, dustproof ,shockproof, rugged design for harsh environment POWKER = Power bank + speaker + flash light , 20 hours none stop music Built in Mic for hands free speakerphone; MP3 SD card slot ; Audio cable connection; Package included: speaker, user manual, charging cable, audio cable