The meter is a general-purpose power meter suitable for a both premise and outside plant applications. The meter is suitable for both single-mode and multimode applications, depending on the source which is used.The meter has an user selectable choice of 0,1 or 0,01 dB resolution, on board memory for 500 readings with date and time stamp, a serial port and an USB port for communication with a PC. The included PC software easily download and document the measurement results stored in the memory. The results can be printed directly from the software or can be saved in a spreadsheet file. These features make of the meter a perfect certification tool. The meter measures optical power, loss (attenuation) and optical return loss. The meter is calibrated at industry standard wavelengths (NIST traceable). The zero reference function is ideal for testing fiber optic cables in dB, the reference value is saved in the power meter. A universal 2,5 mm universal adapter with a threaded housing is included, other adapters are also available as an accessory. Due to the backlight the data is always visible. The meter is delivered in a protective rubber boot.