JW3208 handheld optical power meter is a latest self-developed test instrument which be used for absolute power measurement as well as relative loss measurement. It features ingenious appearance, wide power measurement range, high test precision. The most outstanding of JW3208 handheld optical power meter is brand-new user self-calibrating function and it avoids the complicated and expensive calibration process. Together with JW3109 optical light source, they combine the perfect test solution for the fiber optic projects.