Pryme SPM-1230C Defender-C Lapel Mic for ICOM Side 2-Pin (No Screws). Compatible with ICOM IC-3GT, IC-F11, IC-F11S, IC-F21, IC-F21BR, IC-F21GM, IC-F21S, IC-F3011, IC-F3021, IC-F31, IC-F3G, IC-F3GS, IC-F4011, IC-F4021, IC-F43GS, IC-F43GT, IC-F43TR, IC-F4G, IC-F4GS, IC-F4GT, IC-U82, IC-V8, IC-V82, and IC-51A. 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.