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 converter Plugs into speaker cables to provide RCA output The perfect solution if your headunit does not have RCA Phono outputs Enables an amplifier to be fitted into your Headunit in the vehicle Material: ABS Color as shown Compact design Adjustable Gain output level Specifications: Output adjustmen : 50 percent Dimensions : 90 x 65 x 27 mm Frequency response : 20-20KHz Package Contents: 1X Speaker Converter Only 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.