Monics ME 263 Optical Power Meter With VFL & Rechargeable battery. Monics Optical Power Meter with Vfl & Lan tester. It has a rechargeable battery. Optical Power Meter is full-featured and portable. It has nine working wavelengths (850/980/1270/ 1300/ 1310/1490/ 1550/1577/1625nm). It has a wide range of power measurement (-50 to + 26) and high accuracy It is mainly used for continuous optical signal continuous modulation optical signal power measurement, optical fiber link loss test and optical fiber line on-off test. Product Features Lighting Function Auto-off Function RJ45 Tracking & Sequence LCD & High-Visibility backlit 1 year warranty Power measurement range dBm : -50~+26 Wavelength measurement range nm : 800~1650 Accuracy : <+ 3% (-10dBm, 22 degC) Display Resolution dB - Linear Display : 0.1% and the number of display: 0.01dBm Working temperature (degC) : - 10~+50 Optical interface:FC, SC (ST optional) Power supply : Chargeable Lithium battery Auto power off time : 10 min VFL Wavelength 650nm, output 10mw, Frequency 0HZ/2HZ