Check the listing for details. Headset Noise Cancelling For Vertex VX231 VX261 VX351 VX417 VX451 EVX531 EVX-534. Color: Blue, Condition: New. Listed at 90.51 USD. Heavy duty high quality Noise cancelling headset for Vertex VX231 3 Push-to-talk Buttons with VOX function Adjustable call volume according to your demand. Volume knob (1PTT volume knob). It equips with a 3.5mm mono headphone jack under the helmet PTT. 3 Push-to-talk Buttons (1 big PTT, 1 small finger PTT and 1 helmet PTT). The mic is VOX ready. It can work in VOX mode with radios which has built-in VOX function. If your radio does not have built-in VOX function, it can still work in PTT mode. 2 large soundproofing earpieces close to your ears, which is not sensitive to the background noise. This is ideal for usage in high ambient environment such as driving, riding motorcycles and bicycles. High-quality material and function, It is popular application in the manufacturing engineers, technicians processing industry, construction teams, airport staff, racing teams working in noisy environments For 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. Package: One noise cancelling headset with the cable for vertex VX231 Competible for following models: VX-110, VX-130, VX-131, VX-132, VX150, VX-160 VX-168 VX-180 VX-210 VX210A VX-228 VX-230 VX-231 VX-298 VX-350 VX-351 VX-354 VX-418 VX-400, VX-410, VX-420,VX-428 VX-429 VX-450