1. Self-calibration 2. Wavelength memory function 3. LED light for dark environment 4. Suitable for SM and MM fibers 5. Stable VFL output 10mW 6. Power range -50 to +26dbm 7. SC/FC Connector 8. Rechargeable Battery 9. High Accuracy, High sensitivity, High linearity 10. Lower power consumption design, long standby time 11. Rubber Out shell, increased the protective properties for field work 12. Auto power-off 13. Support Backlight 14. Low battery indication 15. Both linear (mW) and nonlinear (dBm) 16. RJ45 Cable Sequence functions