This unit offers the same proven technology which has been independently evaluated at a 97.5% accuracy rate. Root ZX mini measure just over 4″ x 2 1/2″ and can be placed on the tray or any other convenient location during procedures. The LCD display screen has maintained excellent readability wit a clear, progressive display and high contrast. As with the original model, the ZX mini offers three programmable memory settings. Other features include: shock resistance, automatic calibration and power off function.