ONKYO Cs-245. RMS rated power: 30 W, Frequency response: 40 - 20000 Hz, Impedance: 6 Ом. Speaker type: 2-way, Number of loudspeakers: 2 pcs, Woofer size: 100 mm. Playback disc formats: CD audio. Audio formats supported: MP3. Supported radio bands: FM, RDS features: PS, RT, FM band range: 87.5 - 108 MHz