Also fit Vertex Standard VX-6E, VX-6R, VX-7E, VX-7R, VX-120, VX-120E, VX-127, VX-170, VX-177, VX-270 (Please be aware that Airband Radio VXA-220, VXA-300 and VXA-710 are not compatible). Modular design - being able to interchange and work with every 5 pins cable with or w/o PTT. Behind the head metal band with overhead strap, ideal to use with safety hard hats. Vertex Standard VX-6E, VX-6R, VX-7E, VX-7R, VX-120, VX-120E, VX-127, VX-170, VX-177, VX-270.