Innovative Fiber Optic Technology for advanced performance. Features: Heine HiLite® fiber bundle with 4.3mm dia. and up to 6500 individual micro-fibers for improved light transmission and longer life. Both ends of the large fiber bundle are protected - for life. Integrated Fiber Optics for the best possible illumination. With the alternative of LED or XHL illumination: With either 3x or 40% brighter light as with conventional halogen bulbs. With Classic+ there are no connecting screws to get lost, no external light pathways to get wrong and no tricky openings or crevices to get dirty - a major contribution to eliminating cross-infection. Smooth shape avoids sharp edges and cavities for easy cleaning and sterilizing. These blades need no maintenance - ever. 2.5V battery or 3.5V rechargeable power for even more light. Compatible with all handles to the ISO 7376 (green standard). High quality stainless steel construction.