Featherweight Earphone Microphone has an earbud earphone and a tiny thumb0size microphone/PTT switch thats built right into the cord. Its barely noticeable and so light weight you wont even know its there. Get crystal clear receive/transmit audio out of an ultra lightweight (30 Grams) speaker. Non-directional electret condenser mic has 64dB sensitivity, 1.1K Ohm impedance. 4 foot cord.