3'' loudspeaker made of metal for 70 / 100V lines, Low loss transformer 6 / 3W @ 100V, 6 / 3W @ 70V. Frequency response: 90-18000Hz +/- 10dB, Sensitivity: 85 dB (1W 1m), Dimensions in mm (Diameter x depth) 104 x 90 mm. Color: RAL 9002.