The 3M™ PELTOR™ FLX2 Cable System is designed for simple and reliable connection of accessories for most applications. The 3M™ PELTOR™ FLX2 Cable System is designed for simple and reliable connection of accessories for most applications. Cables are available for listen-only headsets through a PTT adapter or direct connection to the radio. The range includes a variety of solutions for customized use at your discretion.