For lens inspection and progressive lens mark identification. It is small, light-weight and uses very little electrical power. Its ergometric design with a swivel base allows a variety of viewing angles for the operator's convenience.The majority of progressive lens manufacturers employ laser-etched molds to help opticians identify the manufacturer, lens style and add power of the lens . The BPI Mini ID Tech uses a multi-LED light source with a multiply crossed Foucault knife edge pattern for improved viewing of those marks.The unit only uses 11 watts of power at 110 volts AC.The BPI IDTech measures 10"(25.4cm) high by 6"(15.2cm) wide & 6" (15.2cm) deep, weighing only 3 pounds.Product codes:18301 (110 V)218301 (220 V)