The FE-5650A from Morion US is a Rubidium Oscillator with Frequency 10 MHz, Frequency Retrace ±0.05 ppb, Supply Voltage 5 to 18 V, Power Consumption 2 to 12 W(Steady), 2 to 34 W(Warm-up), Phase Noise -145 to -100 dBc. Tags: Module with Connector. More details for FE-5650A can be seen below.