DELL PS511, 1.0 channels, 2 W, Black, Laptop / Netbook, Wired, 22 mm DELL PS511. Audio output channels: 1.0 channels, RMS rated power: 2 W. Product colour: Black, Recommended usage: Laptop / Netbook. Connectivity technology: Wired. Width: 22 mm, Depth: 35 mm, Height: 230 mm. Frequency range: 200 - 20000 Hz