Features: Elevates your auditory experience with the HB03 Adjustable Notch Filter, Filter for audiophiles sound The product with exquisitely craftsmanship and fine materials, using highly temperature resistant inductors with 66mm length wire MKP special auditory large capacitors and so on. It is suitable for full-frequency loudpeakers less than 8inches. This product can be switched to adjust the sound,adopts 4 solderless wire terminals. Easy installation, exquisitely appearance and beautiful sound quality are our features. Specifications: Model No.: HB03 Crossover Type: Trap/Filter Crossover Output: Full-Frequency Loudpeaker Size: about 98x60x25mm/3.86x2.36x0.98in Impedance: 4~8Ω Suitable for Loudpeakers: less than 8 inches Package Includes: 1PC HB03 Crossover note: Please allow 0-1cm error due to manual measurement. please make sure do not mind before bid. Due to difference between different monitors, the picture may not reflect the actual color.