The BSD1001A from Advanced Microwave Inc is a RF Detector with Frequency 100 to 500 MHz, TSS -52 dBm, Frequency Flatness 0.5 ±dB, Voltage Sensitivity 1600 mV/mW, Capacitance 50 pF. Tags: Module with Connectors, Diode Detector. More details for BSD1001A can be seen below.