Features 7 Wavelengths This optical power meter supports 7 wavelengths, each 850nm 980nm 1300nm 1310nm 1490nm 1550nm 1625nm. STANDARD INTERFACE With a 2.5mm standard interface universally used for SC-FC-ST connectors, it has a wide range of applications. HIGH PRECISION The optical power meter has accurate measurement and low error with stable performance. Backlight Function The screen has a backlight function, which is clearly visible even in dark environment and suitable for testing. Silicone Case The case is covered with silicone and has a drop-proof design to protect the machine from damage. Specification: Item Type:Optical Power Meter Material: ABS, silicone. Test accuracy: ± 0.2 dB. Test range: (-70)-(+10)dB Working temperature: -10°C to +60°C. Batteries: 2 x AA batteries (without batteries). Package list: 1 x optical power meter. 1 x SC connector Package List 1 x Optical Power Meter 1 x SC Connector