Pryme SPM-1222sC Defender-C Lapel Mic for Vertex VX EVX Radios (See List). Compatible with Vertex VX-130, VX-131, VX-132, VX-160, VX-180, VX-210, VX-210A, VX-230, VX-231, VX-261, VX-350, VX-351, VX-354, VX-400, VX-410, VX-420, VX-427, VX-450, VX-454, VX-459, and EVX-530. 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.