Enjoy your ride and your workout with this 2-in-1 bike device. Its Bluetooth speaker lets you play music from your phone or answer any calls. It can also work as an MP3 player thanks to its TF memory card slot. With a built-in LED light, you can enjoy biking even at night. It's powered by a rechargeable battery that can last for 4 to 6 hours. The speaker is waterproof and comes ready with a bike mount for easy mounting on the bike handlebar.