ECS Inc., International is a leading global manufacturer of frequency control products including quartz crystals, clock oscillators, resonators, filters, and VCXO’s, TCXO’s, and OCXO’s . . . . . ECS Inc. International recently launched the ECSpressCON, a quick turn oscillator that allows customers to customize specifications choosing from four industry standard packages. ECS has the broadest offering of frequency products for your design.