The TMJ9904 from Spectrum Control is a RF Detector with Frequency 10 MHz to 2 GHz, Max Input Power 15 dBm, Dynamic Range -20 to 10 dBm, Frequency Flatness ±1 to 1.5 dB, Supply Voltage 15 V. Tags: Drop In, Threshold Detector. More details for TMJ9904 can be seen below.