Fatman iTube ValveDock MkII With Speakers. System type: 2.0 system, Speaker placement: Tabletop/bookshelf, Amplifier: External. RMS rated power: 50 W, Frequency range: 20 - 20000 Hz, Signal-to-Noise Ratio (SNR): 86 dB. Amplifier output power: 50 W, Amplifier/receiver input interface type: RCA, USB. Connectivity technology: Wired. Colour of product: Black, Silver