The AR61A-08 from AccuBeat is a Rubidium Oscillator with Frequency 5 MHz, Supply Voltage 23.4 to 28.6 V, Power Consumption 20 to 28 W (Steady State), 161 W (Warm-Up), Phase Noise -153 to -70 dBc/Hz, Short Term Stability 0.003 to 0.03 ppb. Tags: Module with Connector. More details for AR61A-08 can be seen below.