Portable FTTH Fiber Optical Power Meter -70~+10dB Optic Cable Tester Network with FC SC Interfaces for CATV Test,CCTV Test and Telecommunication Practical and Compact Designit - it is portable and easy to bring with large screen and LED backlight;External protective cover make it more durable Seven Calibrated Wavelengths - 850nm, 980nm,1300nm, 1310nm, 1490nm, 1550nm, 1625nm wavelengths are provided with wide measurement range from -70 - +10 dB; User-friendly Functions - The automatic shutdown function can be chosen; low voltage function display notifies you the battery is low; the user auto-calibration function will help the new users to adjust the measurement Versatile Interface Design - The interface is applicably designed for SC, FC, ST;Display Resolution: Linear Display 0.1%; Logarithmic display 0.01dB Applications - fiber CATV Test Engineering, optical fiber CCTV Test communication engineering, integrated wiring system, optical device production and research, optical communication teaching and testing, other fiber optic engineering, etc.