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 unit only uses 11 watts of power at 110 volts AC.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 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)