2 IN 1 Fiber Optic Power meter with 5km Laser source Visual Fault
locator.This kind calibration type optical power meter is for
handheld installation, operation and maintenance of optical fiber
network special design of a precise, durable, convenient portable
test instrument. With clever appearance, can choose to switch back
light display, automatic shutdown function, super wide optical
power test range, accurate testing accuracy and new users
auto-calibration function and general interface design