Line level converter or High-Low converter allows the user to run an RCA cable to an amplifier with a radio that only has speaker wire outputs, Inputs are adjustable as well Not like the other cheapies littered over ebay. Each converter does 2 channels (2 speakers).High to low level car audio converterPlugs into speaker cables to provide RCA outputThe perfect solution if your headunit does not have RCA Phono outputsEnables an amplifier to be fitted into your Headunit in the vehicleMaterial: ABSColor as shownCompact designAdjustable Gain output levelSpecifications:Output adjustmen : 50 percent Dimensions : 90 x 65 x 27 mmFrequency response : 20-20KHzPackage Contents:1X Speaker ConverterOnly 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. 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.