The QPDO-E-10-21 from Qualwave is a Phase Locked Oscillator with Frequency 21 GHz, Output Power 2 dBm, Reference Power 0 to 5 dBm (Input), Reference Frequency 10 MHz, Supply Voltage 12 V. Tags: Module with Connectors, PLDRO. More details for QPDO-E-10-21 can be seen below.