Vertex Standard P4500V The Vertex Standard P4500V is headset/earpiece that is perfect choice when you need a headset that is discrete in appearance, user friendly, and extremely lightweight. The speaker is an earbud style, so that it rests comfortably in the ear. Its molded ear hook is very stable and conforms to the natural shape of your ear. The P4500V is ideal for high noise environments. It is the perfect option for the user that needs a headset to perform throughout the day. This headset works with VX231, VX351, VX354, VX414, VX417, VX424, VX427, VX451, VX454, VX459, EVX531, EVX534 and EVX539 two way radios. P4500V Features Over The Ear Headset Lapel Clip Heavy Duty Plug Push-To-Talk Button Earbud Style Speaker Works On Right or Left Ear Adjustable Earloop Holds Speaker Securely In Place