... built in 2GB USB flash disk, optional TF card music bike light.Description: This multifunctional flashlight with a new type of ... for bikes, it can illuminate the way when riding a bike for leisure. Also, the music can be enjoyed via ... . Flashlight mode option, dim light, glare or flash,3W LED4. Alarm, Give alarm (can set to customer's favorite music)5 ... 3.5mm DC line4) 3.5mm DC line5) bicycle light mount