Sports Ball Shaped USB Rechargeable External Speaker with Key Ring. For Devices with 3.5 Mm Output Jack - Smartphones, Mp3 Players, Cell Phones. Baseball Shape. Brand: Perfect Life Ideas -Tm Elegant compact mini portable sports ball shaped speaker works as an external speaker that connects with the included 3.5 mm audio cable. Rechargeable Speakers charges with included USB cable through any USB power source like your computer or laptop. Perfect for use indoors or outdoors anywhere you go in your car, in your office, dorm room, home or anywhere else. Compatible with mobile phones, mp3 players, tablets, computers, smartphones, cell phones or any other music source with a 3.5 mm audio out jack. Size 1.5 diameter approximately.