The Saramonic SRPMC1, SRPMC2, SRGMC1 and SRGMC2 are high-quality adapter cables that allow you to record audio directly to smartphone devices, and GoPros, with a 1/8" (3.5 mm) headphone connection from Saramonic's Wireless Systems, on-camera mixers and powered microphones or almost any device with a 1/8" (3.5 mm) audio output.