The ECS-163.8-12-33Q-JEN-TR from ECS Inc. International is a RF Quartz Crystal with Frequency 16.384 MHz, Frequency Stability ±50 ppm, Frequency Tolerance ±20 ppm, Load Capacitance 12 pF, Equivalent Series Resistance 80. Tags: Surface Mount. More details for ECS-163.8-12-33Q-JEN-TR can be seen below.