Fiber Optic Ftth Tool Kit Fc-6s Fiber Cleaver Optical Power Meter 10mw Pen-type Visual Fault Finder Pocket size and light weight, easy to use Long battery life(up to 40 hours with AAA batteries) Operates either in CW or Pulsed It displays linear indicators(mW) and non-linear indicators(dBm)in one screen at the same time. It is a compact device with backlight swich and auto power on-off ability.