Pryme SPM-1230sC Defender-C Lapel Mic for ICOM 2-Pin + Screws (See List). Compatible with ICOM F33G, F-51, IC-3GT, IC-F14, IC-F21BR, IC-F21GM, IC-F24, IC-F3021, IC-F302IT/S, IC-F31, IC-F3GS, ICF4021, IC-F402IT/S, IC-F43GS, IC-F43GT, IC-F43TR, IC-F4G, ICF4GS, IC-F4GT, IC-V85, IC-F1000, IC-F2000, BC-100, IC-F3001, IC-F3002, IC-F3031, IC-F4001, IC-F4002, IC-F4031, IC-4101D, and IC-4230. The DEFENDER is a medium-duty lapel microphone with a C-ring style earphone. The combination microphone-PTT features a 360 degree rotating clothing clip that can be used to secure the microphone to the user's shirt. Rugged lapel mic with surveillance style C-Ring earphone. The C-Ring is a secure yet comfortable style earpiece that provides outstanding receive audio. The patented swivel earpiece design allows for longer lasting strain relief. High-quality electret condenser mic element produces excellent transmit audio. Rugged, polycarbonate housing allows for maximum durability. A large, metal clip secures the mic/PTT element to the user's lapel or collar. Conveniently located PTT button for easy use. Features Dual Switch Technology (DST) for maximum PTT durability.