Complete CEP systems include the CEP communications earplugs, the interface that mounts on the helmet, and two pairs of ear tips, one standard and one slim.
CEP systems do not include a helmet cord, but cords are available on this web site on the helmet menu under helmet cords. Gibson & Barnes CEP systems and cords plug together without any splicing or soldering.
CEP Mini is shorter and thinner than the standard CEP, providing a more comfortable fit.
CEP Mini Vented has a small vent that releases pressure at high altitude.