Pulsat Two-Wire Surveillance Earpiece Mic for VERTEX VX-160 VX-180 VX-210 VX-410 VX-420 VX-231 VX-350 VX-351 VX-354 VX-261 EVX-261D EVX Series Heavy Duty Construction, Kevlar reinforced. 12 Months Warranty. Excellent Audio Quality, Rugged Construction.