NFO Optical power meter - The APM65T meter is a device designed for quick and easy testing of optical power in PON networks. Calibration for wavelengths 850nm, 1300nm, 1310nm, 1490nm, 1550nm, 1625nm allows work with single-mode and multi-mode fibers. The meter's measurement range is -70 to 6 dBm , measurement accuracy is 0.15dB, and resolution is 0.01dB PON network testing Connector: SC or FC Power supply: AA*2 batteries Battery life: up to 160h Dimensions: 107x50x28 mm Weight: 70 Operating temperature: -10 C - 50 C Integrated LED night light