The U8488A Option 100 from Keysight Technologies is a Power Sensor with Frequency 10 MHz to 70 GHz, Power Range -35 to 20 dBm, Dynamic Range 55 dB, Operating Temperature 0 to 55 Degree C, Storage Temperature -40 to 71 Degree C. Tags: Thermocouple. More details for U8488A Option 100 can be seen below.