Features: A passive radiator system use the sounds otherwise trap in the enclosure to excites a resonances that makes it easy for the speaker system to create the deepest pitches. Crafted from ABS materials, our low frequency assistant can withstands the testings of time. Perfect for enthusiasts, this rectangular speaker caters to those who want to personalize their sound. Whether you're home, in your car, and hosting a gathering, our low frequency assistant will enhances your sounds in any setting. Unleashings the true potential of your speaker and enjoy the rhythm of the music with our rectangular low frequency assistant. Specifications: Material:ABS Note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color. Package includes: 1Piece Bass Speaker Passive Radiator Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.