This cable converts 1/8 inch. (3.5mm) stereo output to 1/4 inch. (6.35mm) mono signal. Use this to send your stereo output from your device into a mono input device like a guitar amplifier or a mono-input powered speaker. Use it to connect your iRig and AmpliTube setup on your device to your guitar amplifier. It features a 3.5mm (1/8 inch.) male connector and a 1/4 inch. (6.35mm) mono female connector. (Use your standard 1/4 inch. guitar or speaker cable to complete the connection.) Length: 11.8 inch. (30cm).