The HDMI to YPbPr converter is a device that allows you to convert a digital HDMI signal to an analog YPbPr signal. This is useful if you have an older TV or display that doesn't have an HDMI input, but does have a component video input (which uses the YPbPr signal). The converter has an HDMI input port and a YPbPr output port, as well as an LR RCA audio output port.
The handheld optical power meter is a fiber optic test instrument. Fiber-optic installations require end-to-end optical loss measurements. The meter can measure eight standard WDM and CWDM wavelengths: 850nm, 980nm, 1300nm, 1310nm, 1490nm, 1550nm, 1625nm, and 1650nm. It has universal ST, FC, and SC interface connectors, making it a very convenient and universal tool.