The ULN-2550 from Jackson Labs Technologies is a GPS/GNSS Disciplined Oscillator with Frequency 10 MHz, 25 MHz, 50 MHz, 100 MHz, 1574 MHz, Operating Temperature -25 to 75 Degree C, Phase Noise -160 to -88 dBc/Hz, Power Dissipation 4 W, Senstivity Acquisition -144 dBm, Tracking -160 dBm. Tags: Module with Connector. More details for ULN-2550 can be seen below.