6" metal speaker for 70/100V lines with fire- protection, Low-loss transformer 6W, 3W@100V and 3W, 1.5W@70V, Frequency response: 100-20000Hz +/- 10dB, Sensitivity: 92dB (1W 1m), Dimensions in mm (Diameter x Depth): 200 x 90. Weight: 0.9 kg, Colour: RAL: 9016.