Quantum QHM636 USB Powered Wooden Speaker (Black) 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.