ITEM NAME:Audio Converters Durable High To Low Level Subwoofer Signal Stable Car Stereo Features: Anti-oxidation PVC material, transparent shell design, exquisite workmanship. Designed for the original car host without audio output. Using , some noise can be isolated. Adjustable output sensitivity, truly high-frequency switching. For a host that does not have a low frequency output (eg, cassette/card reader/CD/VCD/DVD, etc.) Convert speaker output high frequency to low frequency output for use as a car power amplifier or Subwoofer signal input. Specifications: Product type: car audio conversion Material: PVC Color: transparent Size:about 9x4x2.7cm Voltage: 12V Package included: 1pc x audio conversion Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 0.5-2 cm differences due to manual measurement..Convert speaker output high frequency to low frequency output for use as a car power amplifier or Subwoofer signal input. Designed for the original car host without audio output. For a host that does not have a low frequency output (eg, cassette/card reader/CD/VCD/DVD, etc.).