The CTM-6M-2.5G from Crane Aerospace & Electronics is a Directional Coupler with Frequency 1000 to 4000 MHz, Coupling 6 dB, Coupling Variation ±1 dB, Frequency Sensitivity ±0.50 dB, Directivity 23 dB. Tags: Module with Connectors. More details for CTM-6M-2.5G can be seen below.