The QDPS4-8-12 from Qualink Microwave is a Digital Phase Shifter with Frequency 8 to 12 GHz, Phase_Shift 360 Degrees, Phase Step 22.5 Degree, Power dBm 24 dBm, Power W 0.25 W. Tags: Module with Connectors. More details for QDPS4-8-12 can be seen below.