The DZM040AA from Herotek is a RF Detector with Frequency 100 KHZ to 4 GHz, Max Input Power 23.01 dBm, Frequency Flatness 0.1 to 0.3 dB, Voltage Sensitivity 500 mV/ mW, VSWR 1.30:1. Tags: Connectorized, Diode Detector. More details for DZM040AA can be seen below.