The iLine Mono Output Adaptor Cable converts 1/8" (3.5mm) stereo output to 1/4" (6.35mm) mono signal. Use this to send your stereo output from your device into a mono input device like a guitar amplifier or amono-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") male connector and a 1/4" (6.35mm) mono female connector. (Use your standard 1/4"guitar or speaker cable to complete the connection.) Length: 11.8" (30cm).