It follows the "Open & Smooth" concept, which regenerates even the midrange from the tweeter and eliminates midrange attenuation and disturbance inside the vehicle. Accessories: Screws (φ4 mm x 30 mm) x 8 / Cord (30 cm) x 2 / Woofer bracket x 2 / Screws (φ4 mm x 10 mm) x 8.