The H-RXTi flip-up cap clips into place by slipping the original Rebel XTi eye piece up and off of the camera. Next slide the H-RXTi flip-up cap over the eyepiece mounting flanges to cover the entire LCD screen. The cap provides protection for the delicate LCD screen when in closed position. The cap flips up into a three sided hood for improved outdoor viewing. The H-RXTi flip-up is a great investment in LCD screen protection and performance.