https://www.scmsinc.com/lectrosonics-mc44-male-1-4-mono-plug-to-male-locking-micro-plug-adapter-cable-37.html
Lectrosonics MC44 Male 1/4" Mono Plug to Male Locking Micro Plug Adapter Cable (37")
Connect your audio equipment securely with the Lectrosonics MC44, featuring a locking micro plug and mono 1/4" plug designed for professional use.