The ECS-147.4-12-33Q-JEN-TR from ECS Inc. International is a RF Quartz Crystal with Frequency 14.7456 MHz, Frequency Stability ±50 ppm, Frequency Tolerance ±20 ppm, Load Capacitance 12 pF, Equivalent Series Resistance 100. Tags: Surface Mount. More details for ECS-147.4-12-33Q-JEN-TR can be seen below.