ew100-835SA Sennheiser EW G4 vocal system with dynamic cardioid e835 microphone ew100-835SB Sennheiser EW G4 vocal system with dynamic cardioid e835/S microphone ew100-835SE Sennheiser EW G4 vocal system with dynamic cardioid e835/S microphone ew100-865SB Sennheiser EW G4 vocal system ew100-ME3/B Sennheiser EW G4 headmic system with headworn microphone ew100-ME3/E Sennheiser EW G4 headmic system with headworn microphone