iKross Wireless Bike Computer, Cycling Water Resistant Wireless Digital Backlight Bicycle Multi Functional Odometer Speedometer Brand new bike mount Stereo speaker in retail packaging. Weather proof stereo speaker in fabric Pouch. Travel casing stores your Phone or MP3 Player and protects it from shock and weather With quick release bracket for mounting on bike. Extendable audio input cord and 3.5mm stereo plug On/Off button. 3 x AAA batteries required (sold separately)