Pyle-HOME PMSU1R Bass Expanding Mini Speaker with Built-In USB and SD Card Reader (Red) Plays all iPod/iPhone models and other audio devices with 3.5-mm audio jack Custom-tuned vacuum bass design for low frequency response and sound beyond size Fits in your Hand / Pocket for ultimate portability Built in li-ion rechargeable batteries Built-in amplifier powered by rechargeable battery Play Music From USB Drivers Or SD/MMC Cards Slim Design for easy Transport Volume +/- Button, Easy To Adjust Volume Battery can support MP3 player Card Reader: Mini SD/MMC card Support And USB Port Full Function Remote Controller Color: Red Dimensions:2.1D x 1.6W x 2.5H Sold as : Unit Plays all iPod/iPhone models and other audio devices with 3.5-mm audio jack - Play Music From USB Drivers Or SD/MMC Cards - Full Function Remote Controller Custom-tuned vacuum bass design for low frequency response and sound beyond size - Slim Design for easy Transport - Color: Red Fits in your Hand / Pocket for ultimate portability - Volume +/- Button, Easy To Adjust Volume - Dimensions:2.1"D x 1.6"W x 2.5"H Built in li-ion rechargeable batteries - Battery can support MP3 player Built-in amplifier powered by rechargeable battery - Card Reader: Mini SD/MMC card Support And USB Port