Usage Tips:To separate the mixed audio signal into a treble, bass, and then were sent to the corresponding treble, bass speaker unit in playback, resulting in enhance the sound purposes. Make the treble clear and increase the intensity of the bass, freely enjoy clear and natural music. Wire wound ceramic resistor and metal film capacitors, its large load power, long-term durability, never burnout. Treble and bass frequency dividing, widely used for high end speakers, bookshelf speakers, etc. Circuit board design with precise cut outs and lines, free for welding, very suitable for DIY. Colour:redandblack Material:plasticandmetal Package Contents: 2x 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.