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It takes double AA batteries as outdoor audio device, and it is Bluetooth-enabled device which is interworked with other devices like smart phone or MP3.
Sneaker is usually rolled on the bicycle frame. It also has a light waterproof function.
This product is designed to be functioned on fixed or hanged for the various customer satisfaction. Another strength of the product is that antitheft program is installed in the Bike rock system, so it alarm for emergency
Cheonan-si, South Korea