Z3AD PELTOR STYLE VER.2 FOR HEADSETSuitable for helmet with ACH ARC rail accessory connector kit The kit includes: X2 headphone adapter, 20 mm rail and X2 adapter, tools and instructions The 20 mm rail tilt angle is adjustable and fixed by the high pressure washer that comes with the kit. Compatible with Comtac I, II and IV headphones or COMTAC type arch leg headphones (not included) Helmet, headset and flashlight are not included. The headset cannot be rotated in this rail adapter