The Model 300 is ideal for lab technicians and engineers, photographers and artists, printed micro-circuits, industrial inspection, electronics, jewelry repair, quality control, telephone repair, and military to name a few. The Super Power Magna-Lite fits easily into picket, purse, or glove compartment. - The Super Power Magna-Lite is a precision optical tool with an approximate 10 power lens and conveniently placed on/off switch that can be locked in the on position for extended use.