The OX-400 from Vectron International is a OCXO with Frequency 10 to 40 MHz, Supply Voltage 3.3 to 5 V, Phase Noise -110 dBc/Hz, Phase Noise 10 kHz -150 dBc/Hz, Frequency Stability -±5 to ±10 ppb. Tags: Surface Mount. More details for OX-400 can be seen below.