Premium quality remote speaker microphone that features a 4.5 mm cable and a metal reinforced swivel clip that rotates 360 degrees compatible with Vertex Standard VX-451 two way radio. This high-quality speaker microphone is manufactured with high impact water resistant polycarbonate housing for durability to handle tough work conditions. This speaker microphone features a high-quality mic and high output speaker for clear, powerful sound. The integrated 3.5mm audio jack allows you attach a listen only earpiece. This remote speaker microphone is designed to perfectly complement your two-way radio.This remote speaker is compatible with:Standard EVX-530, EVX-531, EVX-534, EVX-539, Vertex-Standard eVerge EVX-531, eVerge EVX-534, eVerge EVX-539, EVX-530, EVX-531, EVX-534, EVX-539, VX-260, VX-261, VX-264, VX-450, Yaesu-Vertex EVX-530, EVX-531, EVX-534, EVX-539Speaker Microphone Features:*Manufactured with high-impact water resistant Polycarbonate Housing.*High Output speaker for clear, powerful sound.*Includes a 4.5 MM jacketed coil cable.*Includes a metal reinforced swivel clip that rotates 360 degrees.*Features a built-in 3.5 mm audio jack for optional earphone.*IP54 Rated to operate in dusty conditions and resist splashing water.*Includes a 12-months free replacement warranty for manufacturer’s defects.We provide premium quality remote speaker microphone, manufactured by ISO 9001 certified plants using state-of-the-art technology for the finest quality speaker microphone. Each speaker microphone is tested throughout the manufacturing process to be free of defects for form, fit and workmanship.