The QDPS8-2.5-4 from Qualink Microwave is a Digital Phase Shifter with Frequency 2.5 to 4 GHz, Phase_Shift 360 Degrees, Phase Step 1.4 Degree, Power dBm 25 dBm, Power W 0.32 W. Tags: Module with Connectors. More details for QDPS8-2.5-4 can be seen below.