The PLO-4400N from RF Bay is a Phase Locked Oscillator with Frequency 4.395 to 4.405 GHz, Output Power 15 to 16 dBm, Reference Frequency 10 MHz, Reference Power -7 to 17 dBm, Supply Voltage 11 to 15 V. Tags: Module with Connectors, PLXO. More details for PLO-4400N can be seen below.