While most mobile devices use the 3.5 mm stereo headphone output, most home audio systems with an amplifier or receiver use RCA jacks for audio inputs. This cable is ideal for adapting the output of your MP3 player or phone to stereo RCA plugs for connecting to your home audio system.The cable is made of heavy-duty coaxial cable for each conductor. The conductors are 22 AWG and each conductor is shield to prevent EMI or RFI interference from entering your audio system. The cable is 12 mm x 6 mm thick, while the connector housings are about 41 mm long x 15 mm diameter.