The QPDO-EI-10-4.5 from Qualwave is a Phase Locked Oscillator with Frequency 4.5 GHz, Output Power 13 to 15 dBm, Frequency Stability ±0.1 ppm, Reference Frequency 10 MHz, Supply Voltage 12 V. Tags: Module with Connectors, PLDRO. More details for QPDO-EI-10-4.5 can be seen below.