The 501-24245 from Quantic Wenzel (Wenzel Associates, Inc.) is a OCXO with Frequency 12000 MHz, Supply Voltage 15 V, Output Power 13 dBm, Output Load 50 Ohms, Phase Noise -127 to -55 dBc/Hz. Tags: Module with Connectors, Low G-Sensitivity. More details for 501-24245 can be seen below.