The speaker is suitable for 4-8 ohms impedance. The design is based on the 4-8 ohms mass value design. Most products are the same, in order to improve the sound quality. Frequency point: 2800Hz(that is, the bass works at frequencies below 2800HZ, and the treble works above 2800HZ(2.8KHz). Power: Single 350W.(Below 700W) Impedance: 4-8 Ohm. Circuit: Treble 12db/oct second class,Bass 12db/oct second class size:120 x 77 x 37MM Material:Metal + plastic colour:black Package Contents: 2 x Frequency dividers Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.