The STZ 265 from Crane Aerospace & Electronics is a RF Detector with Frequency 0.01 to 26.5 GHz, Frequency Flatness ±0.3 to ±0.75 dB, Voltage Sensitivity 400 to 500 mV/mW, VSWR 1.40:1, 2.00:1. Tags: Connectorized, Diode Detector. More details for STZ 265 can be seen below.