QuarzOur products are designed, built, and QC-passed in our factory in France. We use high-quality components for all elements of our products (including PSUs), and as such are proud of our exemplary reliability record. The quartz crystals we use for generating the timing signals for the microprocessors in our devices are made to the smallest tolerances possible to virtually eliminate drift between devices, we opto-couple our inputs and outputs (using expensive, high-grade opto-couplers), and have eliminated mechanical parts in favour of solid state technology.