Going for a ride before winter time can be a lot of fun. You can always get a better riding experience with your mp3 player with you. The Bicycle Speaker Case helps too. It connects to any MP3 player and has a built-in USB reader. The 1000mAh rechargeable battery can go for up to 5 hours. The cases holds your sunglasses, phone, or mp3 device. It will cost you under $18.