The HJF-C-500 SQ from Crane Aerospace & Electronics is a Space Qualified Coupler with Frequency 2 MHz to 1 GHz, Coupling 3 dB, Power 1 W, Amplitude Balance 0.2 to 0.5 dB, Phase Balance ±5 to 7 Degrees. Tags: Surface Mount. More details for HJF-C-500 SQ can be seen below.