Wheel shape design, offering better visual experience. Using Bluetooth 2.1 + EDR technology, long transmission distance up to 10 meters. Compatible with all Bluetooth enabled digital devices. Enjoy hands-free phone calls and music in the car, making your driving or trip more elegant and safer. Enable directly playing MP3 files in TF / micro SD memory card, support TF card up to 32GB. Built-in lithium battery, extending the playing time for outdoor use. Conveniently charged via USB cable. Compact size of ease for carrying anywhere. Get this Speaker at Special Offer: Take 52% OFF + Free Shipping For GM001 Novelty Bluetooth Music Player Speaker Now Only $15.99.