Mini Speakers Portable Speakers Play Music From Smartphones Cellphones Mp3 Plays or Other Music Source with 3.5 Mm Output Jack. USB or Battery Powered. Color Blue. Brand: Perfect Life Ideas -Tm Compatible with mobile phones, mp3 players, tablets, computers and more. Perfect for use indoors or outdoors anywhere you go in your car, in your office, dorm room. USB or Battery Powered. Uses 3 "AA" Size Batteries.(Not Included.) Size 6.5 wide x 3.25 high x 3.0 deep approximately. Features an input for a DC 5V AC Adaptor (not included), or by a USB power source from your computer or laptop using the USB cable included. Ideal for phones, music players, computers, tablets, gaming devices using the included 3.5 mm audio cable included. Ideal for small areas, like dorm rooms, apartments, and great for travel.