Quantum QHM630 Multimedia Speakers (Black) Connectivity Power Jack: USB 2.0 (Plug and Play) Audio Cord Type: 3.5mm Controls VOL-, VOL+, Mute. Specifications, Connectivity, Power Jack: USB 2.0 (Plug and Play), Audio Cord Type: 3.5mm. Watt: 3W x 2, Controls: VOL-, VOL+, Mute. Dimensions: width x height x depth 9 x 10 x 16 cm, Weight: 700g.