... 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 ... quality speaker with high volume. 3. Flashlight mode option, dim light, glare or flash,3W LED4. Alarm, Give alarm (can ... 3.5mm DC line4) 3.5mm DC line5) bicycle light mount