Prime 2 is a 2.0 USB multimedia speaker which has an input of 5V. It comes with a 3.5 mm jack and a volume control button which goes with the design scheme of a box. SPECIFICATIONS Interface USB Power input (DC) 5V Frequency Response 200Hz - 18KHZ Driver unit size 2" x 2 Ouput power (R.M.S) 2W x 2 Signal to noise ratio ?65dB Separation ? 55dB Impedance 4 Ohm Dimensions 145 x 70 x 75 mm (W x H x D) Input connectivity 3.5 mm jack