YPA MM4-C4T Earset Microphone Headset Mic FOR AUDIO TECHNICA Wireless Easy and fast adjustment to fit your earset Detachable connector, supports replacement with AUDIO TECHNICA connector(included) Mini condenser capsule, only 3.5 mm,Provides high-quality voice pickup C4T: use for Audio-Technica ATW-T1000 D/ ATW-T310/AEW-T1000/ATW-T701 (MicroDot to 4 pin Female Hirose) A double vent protection system, a drop stopper on the microphone boom, together with water resistant materials inside the microphone