The HHM2510B1 from TDK is a Directional Coupler with Frequency 2.4 to 2.5 MHz / 4.9 to 5.85 GHz, Coupling 11 to 20.5 dB, Insertion Loss 0.25 to 0.45 dB, Isolation 25 to 30 dB, Return Loss 17.69 dB. Tags: Surface Mount. More details for HHM2510B1 can be seen below.