The CPJC-28-252R+ from Mini Circuits is a Directional Coupler with Frequency 2400 to 2500 MHz, Coupling 28 dB, Coupling Variation ±2 dB, Directivity 6.5 to 10 dB, Average Power 2 W. Tags: Surface mount. More details for CPJC-28-252R+ can be seen below.