1、VARIOUS FUNCTIONS: Optical power meter can detect optical fiber fault detection, locate optical breakpoint, measure optical transmitter power (dBm and W), and measure optical fiber line loss 2、GOOD COMPATIBILITY: Optical power meter FC, SC, ST and other interfaces are universal and support the testing of different wavelengths of red light source(650nm) and optical power light source(850nm, 1300nm, 1310nm, 1490nm, 1550nm, 1625nm) 3、EASY TO OPERATE: LCD displays description, function buttons are clear and easy to operate, Optical power meter has low voltage prompt function, optional automatic shutdown function and switch backlight display 4、LONG STANDBY OPERATION: The optical power meter is powered by three 1.5V AA batteries(not included) for up to 200 hours of continuous operation and equipped with a charging interface that supports charging function 5、EASY MAINTENANCE: Dust cover design can prevent the optical fiber detection head from being contaminated by dust and pollutants. After use, just cover with dust cover, easy to use, not easy to lose Item Type: Optical Power Meter Material: ABS Battery: 3 x AA battery(not include) Operating Temperature: -10℃~+60℃ Storage Temperature: -25℃~+70℃ 1 x Optical Power Meter 1 x Storage Bag 1 x User Manual