Teufel Concept B 20. System type: 2.0 system, Recommended usage: PC, Speaker placement: Tabletop/bookshelf. RMS rated power: 40 W. Connectivity technology: Wired, Speaker interface type: 3.5 mm, Headphone connectivity: 3.5 mm. Housing material: ABS synthetics. Width: 126 mm, Depth: 124 mm, Height: 220 mm