The OSA 3350 ePRC+ from Oscilloquartz is a Time and Frequency Standard with Frequency 5 MHz, 10 MHz, 2.048 MHz, Frequency Stability ±0.000001 ppb(Frequency settability resolution), ±1 ppb(Frequency settability range), Phase Noise -150 to -90 dBc/Hz, DC Supply 18 to 30 V. Tags: Rack mount, Time & Frequency Standard. More details for OSA 3350 ePRC+ can be seen below.