This nickel Wireless Head from Shure replaces a damaged or faulty element on a KSM9HS handheld condenser microphone. It features dual 3/4" gold-layered, low-mass Mylar diaphragms and switchable hypercardioid an subcardioid polar patterns for flexibility in demanding performance applications. The capsule's 50 Hz to 20 kHz wide frequency response enhances vocal character.