Features 1、7 Wavelengths: This optical power meter supports 7 wavelengths, respectively are 850nm 980nm 1300nm 1310nm 1490nm 1550nm 1625nm. 2、Silicone Cover: The shell is covered with silicone and has a drop proof design, keep the machine from damage. 3、Standard Interface: With 2.5mm standard interface, universally used for SC FC ST connector, has a wide range of applications. 4、High Precise: The optical power meter has accurate measurement and low error, with stable performance. 5、Backlit Function: The screen has a backlit function, which can be seen clearly even in the dark environment, convenient for testing. Specification Item Type: Optical Power Meter Material: ABS, Silicone Test Accuracy: ±0.2dB Test Range: (-70)-(+10)dB Working Temperature: -10℃ to +60℃ Batteries: 2 x AA batteries (shipped without batteries) Package List 1 x Optical Power Meter 1 x SC Connector