Function: Can measure 6 types of light wavelengths - 850nm/1300nm/1310nm/1490nm/1550nm/1625nm, testing range: 70-6dBm Easy to use: compact design, light weight, easy to carry, simple operation, low power consumption, large LCD display screen displaying test results, easy to read. Support FC/SC/ universal interface, switch between absolute power and relative power readings, automatic power-off (optional) and battery indicator light Application areas: Fiber optic engineering and sensor research, optical component production and research, and other fiber optic engineering. Color:Black Material:plastic Package Contents: 1 * portable optical power meter set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.