The APS-04900510-180-1F-1FS from Narda-MITEQ is a Analog Phase Shifter with Frequency 4.9 to 5.1 GHz, Phase Shift 180 Degree, Insertion Loss 6 dB, Control Voltage -18 to 0 VDC, Power 10 dBm. Tags: Module with Connectors. More details for APS-04900510-180-1F-1FS can be seen below.