The DZR400KC from Herotek is a RF Detector with Frequency 10 MHz to 40 GHz, Max Input Power 23.01 dBm, Frequency Flatness 0.3 to 1 dB, Voltage Sensitivity 400 mV/ mW, VSWR 1.30:1, 1.80:1. Tags: Connectorized, Diode Detector. More details for DZR400KC can be seen below.