Hiditec H450, 2.1 channels, 80 W, Universal, Black, Digital, 40 W Hiditec H450. Audio output channels: 2.1 channels, RMS rated power: 80 W, Recommended usage: Universal. Satellite speakers RMS power: 40 W, Satellite speaker impedance: 4 Ω, Satellite speaker mid-range driver diameter: 7,62 cm (3"). Subwoofer type: Active subwoofer, Subwoofer impedance: 4 Ω, Subwoofer driver diameter (imperial): 12,7 cm (5"). Power source: AC. Connectivity technology: Wired & Wireless, Line-in connectivity: 3.5 mm