Visaton FRS 7 W. Driver size: 63.5 mm (2.5 "). RMS rated power: 8 W, Peak Music Power Output (PMPO): 15 W, Frequency range: 120 – 20000 Hz. Diameter: 60 mm, Weight: 0.22 kg. Type: In-wall/On-wall/In-ceiling speakers, Dimensions (WxDxH): 66.5 x 66.5 x 37 mm, Audio output channels: 1.0