NAXA Electronics NAS-3048 BLACK Wireless Sports Stereo Speaker with Bluetooth (Black/Grey) Sports design with water resistance for outdoor use Compact speaker delivers big stereo sound from twin 40 mm full-range drivers Plays MP3s from the built-in micro SD card slot Connects via Bluetooth or 3.5mm AUX audio (with included adapter) Accessories included: Combination USB charge cable + 3.5mm AUX audio adapter