GAOTek Handheld Optical Power Meter with -70 to +10 dBm Measuring Range, FC, SC, ST, LC Adaptor, 850 nm -1700 nm calibrated wavelengths, InGaAs Detector |OPM-101-D: Amazon.com: Industrial & Scientific
Digital Anemometer Handheld Wind Speed Meter,WT87B Handheld Portable USB Bluetooth Digital Anemometer Thermometer Wind Speed Meter: Amazon.com: Industrial & Scientific