DRH-110B “RCS” Headlight DRH-110B Surgical Headlight with “RCS” System Product Details The Rear Cranial Support system is a revolutionary concept that truly enhances the comfort in wearing a surgical headlight. The material is even lighter and more flexible than our older style headband. The cable clips have been integrated into the headbands new design for durability and to minimize fiber breakage. The top support now runs front to back to add module stability. Personalize your Headlight by having your name laser marked on the top support.