1、[CLEAR DISPLAY] The clear screen display of the power meter allows you to read clearly, and these details can greatly improve your experience. 2、[SENSITIVE CHIP] The sensitive chip inside the power meter makes the display result accurate and can perfectly test the connection loss. 3、[10 WAVELENGTHS] Can measure 850, 980, 1270, 1300, 1310, 1490, 1550, 1577, 1625, 1650nm wavelength light source, covering most of the needs of communications engineering maintenance. 4、[LONG BATTERY LIFE] The optical power meter has a long standby time, and the battery (excluded) can be used for at least 120 hours, which is convenient for your use. 5、[HIGH ACCURACY] No waiting for warm up, this optical power meter is plug and play for accurate measurements, with relative power calculation and calibration.