New YPA MM2-C4SE Headworn Microphone Headset Mic For Sennheiser Wireless Tan Color, Lightweight, Omnidirectional Condenser, Easy Exchangeable Connectors(C4SE connectors included); Easy and fast adjustment to fit your headsize,Mini condenser capsule, only 3.5 mm Provides high-quality voice pickup,Detachable connector, supports replacement with Sennheiser connector C4SE: use for SENNHEISER Evolution/G2/G3, /X2 Digital Wireless Systems (MicroDot to 3.5mm Mini-Jack (with thread)) A double vent protection system, a drop stopper on the microphone boom, together with water resistant materials inside the microphone