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.   For Kenwood.