Power: single 400W; Triple debugging: you have three strong, medium, low; Bass debugging: set to full tone, midrange, bass, or powerful bass Improved version of plug: "MID" and bass "for the general frequency of two, If the tweeter sounds low: you can set the "medium" change to "strong" If you have a subwoofer, you can try switching from "bass" to "midrange" ;Plug "medium" and "low", is for standard high and low frequency PLUG "Low" and "strong" Bass ", is a high low frequency ; Plug "strong" and "low", is a kind of "high frequency" " Plug "mid" and "full tone", it is a "mid frequency" The crossover is suitable for a high slant midrange two bass speaker or a bass speaker. The loudspeaker is suitable for impedance of 2-16 Ohms. The design is based on the massive 2-16 Ohm value design. Most of the products are the same to improve the sound quality. Colour:Red Green Material:Metal Package Contents: 4 x Speaker Crossover Only the above package content, other products are not included. Note: Light reflection 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.