The PS-921 from Synergy Microwave Corporation is a Analog Phase Shifter with Frequency 10 to 20 MHz, Phase Shift 180 Degree, Insertion Loss 1.3 to 1.8 dB, Control Voltage 0 to 12 V, Operating Temperature -40 to 85 Degree C. Tags: Surface Mount. More details for PS-921 can be seen below.