PTT301 is a slim push-to-talk ring that fits between the microphone body and capsule to enable PTT control on compatible wireless mics. The 14 mm height preserves the microphone's form factor while providing a dedicated PTT button; the unit employs Wisycom's technology to route the audio feed and trigger the transmitter's audio path. Compatible with MTH400 and MTH410 systems, it supports professional applications in live sound and broadcast.