External Push to Talk (PTT) Adapter Cable for 5 Pin Ports allows addition of a Push to Talk to your 5 pin radio or intercom port. Ideal for adding an external PTT on RRP362, 362-BT and 364-BT intercoms. Can also adapt a secondary PTT to your 5 pin intercom headset / helmet port. Can be used with: PTT-VM2 PTT-HM for enhanced communication.