This Countryman E6 Cable includes a Hirose 4-Pin Connector and works with these Audio Technica wireless transmitter models: T35, T75, T211, T601, 1000 Series, 1200 Series, 4000 Series, 5000 Series, 7000 Series. That means you can replace a worn E6 cable at a fraction of the cost of replacing the entire Countryman mic! You can afford to keep extra E6 cables in your kit for emergencies. And, you can use the same mic on multiple wireless systems simply by purchasing the appropriate e6 cable.