SAY GOODBYE TO WIRES. EPC is leading the way with breakthrough wireless two-way radio accessories. In 2013, we brought the first Bluetooth Lapel Microphone with PTT to the market and was honored with the CES Innovation Award. Soon after, the patented Interceptor Bluetooth Speaker Microphone with Dual PTT followed. Our Bluetooth line has evolved with upgraded firmware that now supports built-in Bluetooth radios and POC (Push-to-Talk Over Cellular) Apps.