At the heart of the R21S's performance is its shock-mounted microphone element. The capsule offers high gain output and a low impedance design, as well as a cardioid pickup pattern. This allows the R21S to capture all the nuances of any performance with exceptional clarity and detail, while reducing feedback and unwanted signals.

The R21S offers a frequency response of 80Hz-12kHz, which is ideal for vocal and presentation applications. It is also designed to withstand high SPLs, producing vocals that sound huge and crystal clear. This makes the R21S a versatile tool in recording environments.

The R21S features a convenient on/off switch and an XLR to 1/4" microphone cable. A microphone clip is also included for added versatility.