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Multi-Function Rechargeable Bicycle Speaker For all iPhones, iPods, Phones, Android Devices and MP3 Players - With USB and SD Card Player - With External Audio Controls - 1000mAh Rechargeable battery - Can Also Be Used an External Battery Pack to Charge Your Device
AUX Audio Player: The AUX input makes this device Compatible with all audio players, the 3.5mm plug connects to any device with a 3.5mm audio socket/stereo headset jack - External controls for this feature are volume up/down.
USB Audio player: Allows you play audio from USB sticks and SD cards (with a USB adapter) External controls for this Feature are play/pause/forward/reverse and volume up/down.
External Battery Pack: Allows you to recharge any phone or device that charges via USB
Works With Almost Any Player Or Phone: The speaker system works with any MP3 player or phone that has a Standard 3.5mm Jack, giving you unlimited compatibility with almost all devices on the market.