CP142X This is an audio peripheral equipment for Notebook， PC， desktop， etc. High fidelity acoustic， clear stereo sound， noise resistant. Compact size， lightweight and portable. High-effect speaker， low power consumption， saving energy. Comes with one 3.5mm plug and the other plug is 2.5mm . This PC speakers also used for all 3.5mm audio devices， but need PC supply power as well， can also be powered by three AA batteries (Batteries non included). With sucker， place the desktop speakers on proper places steadily， also a beautiful decoration for your room. Ideal speaker can enhances your music experience anytime and anywhere.