1、500 Data Storage: This optical power meter can store 500 sets of data inside, and supports viewing at any time for easy comparison of test results. 2、Power Saving: This optical power meter will automatically shut down after ten minutes of standby, so the battery consumption is low and it can work continuously for 40 hours. 3、Accurate Test: The test results of the optical power meter are fast and accurate, which can accurately distinguish the connection loss and check the continuity. 4、Simple Operation: This optical power meter is easy to operate, no need for you to preheat, plug and play, and can perform relative power calculation. 5、Wide Application: The tester has 7 wavelengths, 850nm, 980nm, 1300nm, 1310nm, 1490nm, 1550nm, 1625nm, which can cover most of the needs of communication engineering maintenance. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.