Bright LED illumination for reliable viewing in low light. The loupe has 6 builtin LEDs: 3 white for normal magnification observation and 3 purple UV for checking banknotes. This lighting lets you see details clearly in dark or dim environments. Clear, precise focus with a fixed focal length. No adjustment is required. Simply place the loupe on a flat surface and position the object in the middle of the scale to view fine details consistently, with the ability to move the object as needed. USB rechargeable power. Comes with a micro USB charging cable, so you do not need to batteries over time. Durable solid construction. Made of zinc alloy with a black paint finish for longlasting durability and resistance to wear. Practical applications: Jewelry and gemstone inspection for flaws, inclusions, and setting accuracy. Currency verification using UV LEDs to detect counterfeit features. Examination of small electronics components, watch parts, or other tiny items requiring detailed inspection.