Hama Sonic Mobil 183, 2.0 channels, Wired, 3 W, 120 - 20000 Hz, 4 Ω, Black, Red Hama Sonic Mobil 183. Recommended usage: PC. Audio output channels: 2.0 channels, Number of drivers: 1. Connectivity technology: Wired. RMS rated power: 3 W, Frequency range: 120 - 20000 Hz, Impedance: 4 Ω. Product color: Black, Red