Visaton FR 12. Driver size: 127 mm (5 "). RMS rated power: 15 W, Peak Music Power Output (PMPO): 40 W, Frequency range: 70 – 18000 Hz. Diameter: 130 mm, Weight: 0.284 kg. Type: In-wall/On-wall/In-ceiling speakers, Dimensions (WxDxH): 146.5 x 146.5 x 31 mm, Audio output channels: 1.0