Mono audio cable used in connecting microphones, connecting audio lines, and connecting instruments. Based on a 6.3mm male jack connector at one end and a 6.3mm female jack connector at the other end. The function of this cable is to extend an audio line. High quality balanced (symmetrical) cable, double shielded, flexible cover (silicone), OFC (Oxygen Free Cable or Oxygen Free Cable) and with high quality metal connectors. Specifications Mono audio cable used in connecting microphones, connecting audio lines, and connecting instruments. Based on a 6.3mm male jack connector at one end and a 6.3mm female jack connector at the other end. The function of this cable is to extend an audio line. High quality balanced (symmetrical) cable, double shielded, flexible cover (silicone), OFC (Oxygen Free Cable or Oxygen Free Cable) and with high quality metal connectors. 20m long black cable.