Visaton FRS 8. Driver size: 83.8 mm (3.3 "). RMS rated power: 30 W, Peak Music Power Output (PMPO): 50 W, Frequency range: 100 – 20000 Hz. Diameter: 80 mm, Weight: 0.28 kg. Type: In-wall/On-wall/In-ceiling speakers, Dimensions (WxDxH): 93 x 93 x 40 mm, Audio output channels: 1.0