The Miniature handheld optical power meter is an upgraded version of the popular OPM-G. The overall design of this power meter has been improved, including more calibration wavelengths, better user interface, longer battery life, higher accuracy, tone detection, wavelength recognition, USB and data storage. This product has wide measurement range, high accuracy. It is an ideal choice for low-cost power measurement solution.         Features:    Standard FC and SC adapters are supplied with the power meter.    High sensitivity and high precision- it responses very quickly without preheating and can display fast-tracking and real-time measurement when output power changes, with a high accuracy    Versatile interface design- the interface is applicable designed for SC, FC, ST connections and standard universal 2.5mm adaptors, making it more suitable for ftth    Practical and compact design- Miniature chassis protection design prevents damage caused by accident drop; it is portable and easy to bring with large screen and LED backlight    User-friendly functions- the automatic shutdown function can be chosen; low voltage function display notifies you the battery is low;         Specifications:  Calibrated Wavelength (nm): 850nm, 1300nm, 1310nm, 1490nm, 1550nm, 1625nm  Detector: InGaAs  Measurement Range (dBm): -50 - +26 and -70～+10  Resolution (dB): Linear 0.1% / Non-linear 0.01dBm  Connector: SC, FC, ST/ Universal 2.5mm Adaptor  Operating Temperature(C): -10 - +50  Storage Temperature(C): -20 - +70  Relative Humidity: 90% (+30C)  Working Hours: >120 hours (Without Backlight)  Size (mm): 130x63x29   Package Content:  1x Power Meter  1x Oxford Fabric Case  1x ST, FC, SC Connector  1x English Manual