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 : two AA batteries Auto power off time : 10 min VFL Wavelength 650nm, output 1/10/20/30/50mw, Frequency 0HZ/2HZ Additional Information: Delivery Time: READY STOCK