The Heil Sound RC 22 Nickel is a replacement microphone capsule designed for compatible wireless mic systems and handheld transmitters, using the same internal elements as the PR 22 professional microphone to support a consistent sound profile in wireless applications. It delivers clear midrange and high-frequency response for singing, speech, and live sound use, with a large diaphragm and phasing plug design that helps reduce pickup of side and rear noise for more controlled audio capture. The patent-pending ISO BAND shock-mount system helps minimize handling noise during use, while the screw-on design allows for straightforward installation without complex setup. This wireless capsule is compatible with Lectrosonics and Line 6 systems with removable capsules, most Shure wireless systems such as BLX and SLX models excluding ULX, and Audix H60 transmitters with the included spacer ring, making it suitable for users looking to upgrade or replace a microphone capsule within an existing wireless system.