【PRODUCT SPECIFICATION】:Multiplier: 3, 4, 5, 6, 7, 10X (can be combined into 21 multiples). Lens Focus Length: 20-166mm / 0.8-6.5in. Lighting Source: 2 LED lights 【PRODUCT FEATURES】:The anti-slip design of the head, which is not easy to fall off when worn on the head, frees the hands in the experimental observation and makes the work more efficient 【MULTI-FUNCTION】:This multifunctional LED top mount magnifier is specially designed for components inspecting. You can work more efficiently by expanding the articles 【PRODUCT DESCRIPTION】:This is a perfect head wearing magnifier, suitable for close up work like precision parts detection and watch repairing 【LED ILLUMINATION】:Two LEDs with interchangeable cold and warm lights, fully illuminating the viewing area for easy recognition. 3X, 4X, 5X, 6X, 7X, 10X different magnifications, it can be combined into 21 kinds of combinations to meet differnent needs