This pair of stereo speakers by Delock can be connected to a free 3.5 mm stereo jack female port to listen to music, for example.Universal & mobile applicationDue to the USB power support and the 3.5 mm stereo jack male connector, the speakers can be used universally. No external power supply is needed, as the power supply is USB powered. The speakers can therefore be used on the go with a laptop or at home with a PC, tablet or MP3 player.Stereo soundDespite their compact size, the speakers offer good sound quality.Step less volume controlThe speakers have a volume control on the back of the housing for individual and continuous volume adjustment.Additional protectionThe speaker membranes are protected by a fine metal grille and are protected from mechanical damage. In addition, the speakers have rubber feet on the bottom to prevent the table from being scratched.