The general dimensions of the Riviera speaker are 118 x 108 x 64 mm , with a weight of 0.66 kg . | The system of this speaker is one-way . | The maximum power is 10 W , reaching around 88 decibels (db), a sufficiently high volume for clear listening both outdoors and indoors. | The electrical resistance of this speaker is 4-8 OHM impedance . | The frequency response of a speaker is the measure of relative volume at which the speaker reproduces different frequencies. This product has a response of 80-18000 Hz . | Product manufactured in Italy, with UV-resistant grille .