The ECS-480-10-37-RWM-TR from ECS Inc. International is a RF Quartz Crystal with Frequency 48 MHz, Frequency Stability ±15 ppm, Frequency Tolerance ±15 ppm, Load Capacitance 10 pF, Equivalent Series Resistance 50. Tags: Surface Mount. More details for ECS-480-10-37-RWM-TR can be seen below.