Shure UA8-578-638 ½ Wave Dipole Antenna 1017198 and you can even use

and you can even use multiple effects at the same time

Color: red white and blue

The advantage compared to vactrols is the much faster response of opto FETs compared to LDRs

each microphone is measured to a tolerance of max

as well as controls to skew the cutoff and resonance in the stereo field

Shure UA8-578-638 ½ Wave Dipole Antenna 1017198 and you can even useWave Dipole Antenna 578 638 MHz Features: 1 2 wave dipole antenna offers 45 degree positioning related to the horizontal or vertical position for more flexibility for better RF reception. Compatible with Axient, UHF R, ULX D, ULX, SLX and BLX4R receivers and PSM1000 and PSM900 transmitters (frequency range dependent). The UA8 replaces the UA820 antenna.