Ergonomically designed PTT button, fit your finger.1-Pin Screw plug for Vertex Standard radios, durable to use.Rotatable ear-plug, suitable for either left or right ear.Extendable long coiled wire, easy to operate.Low-profile, microphone near the ptt button, clear sound.It's widely used by personnel in restaurant, , shopping , police station, and the other requiring quick and easy communication.Can be applied on the following radio models (for Vertex Standard radios):VX-110, VX-130, VX-131, VX-132, VX-150, VX-160, VX-168, VX-180,VX-210, VX-210A, VX-228, VX-230, VX-231, VX-298,VX-350, VX-351, VX-354,VX-400, VX-410, VX-417, VX-418, VX-420, VX-428, VX-429, VX-450,VX-451, VX-454, VX-459.Colour:blackMaterial:ABSPackage Contents:1 x Earhook Earpiece HeadsetOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.