Dragonwar SP-011G Music Revolution Professional Gaming Speaker with Hyper Bass and 3D sound technology with 2.0 channel SYMARVTRY Patented technology - Hyper Bass System Combine active & passive speaker to create 3D sound technology with 2.0 channel Proprietary amplifiers with smaller, lighter and more efficient than traditional amplifiers NEXPHIL - Clear and anti-noise technology USB plug for power. Dimension: 2.5 (W) x 5.5 (H) x 4 (Depth) inch Lifelike performance well beyond speaker size helps you free up valuable desktop space