Atlantis Land SoundPower 280. RMS rated power: 4 W, Frequency range: 45 - 20000 Hz, Signal-to-Noise Ratio (SNR): 85 dB. Connectivity technology: Wired, Headphone connectivity: 3.5 mm. Audio output channels: 2.0, Satellite speakers RMS power: 2 W, Power requirements: AC 100V@50/60Hz