Bionime's Rightest™ GM550 Blood Glucose Meter incorporates a unique, patented True Auto-Coding system. Each test strip incorporates a patented coding system that automatically calibrates the meter each time a test strip is inserted. The GM550 meter also includes backlight display, large 500 result memory and downloadable results. GM550 meter incorporates patented, gold plated, nano-technology and proprietary chemistries to ensure accurate, reliable and consistent results that diabetics can depend on to effectively manage their diabetes.