1、EASY TO USE: Mini optical power meter can measure quickly and accurately. No need to wait for preheating, plug and play, accurate measurement! 2、MULTI FUNCTIONAL: Not limited to simple measurement, but also with relative power calculation, calibration function, and RJ45 line finding function. 3、REASONABLE STRUCTURE: Sensitive chip and solid internal structure make the use of optical power meter more convenient and have a longer service life. 4、LONG BATTERY LIFE: Low battery consumption, capable of working continuously for 120 hours. Rest assured to use outdoors. 5、EASY CARRYING: Comes with a small size and a light weight as well, this optical power meter can be easily carried around for convenient use. Item Type: Mini Optical Power Meter Material: ABS Wavelength: 1310nm, 1550nm Output Power: -5dB Optical Connection: SC, FC, 2.5MM universal Power Supply: Built in 3.7V polymer lithium battery x 1 capacity 650mAh (shipped with built in battery) Output Stability: ± 0.05dB/15MIN, ± 0.1dB/8H Modulation Frequency: CW, 270Hz, 1KHz, 2KHz 1 x Optical Power Meter 1 x USB Cable 1 x SC Adapter 1 x FC Adapter (installed on the machine) 1 x Manual