The meter uses <B>Low (70 mg/dl)</B> and <B>High (180 mg/dl)</B> range limits that are pre-set. Check with your health care provider about the range limits that are right for you. If you need to change the limits, press <B>OK </B>to turn the meter on. Press and hold the ▲ and ▼ Arrows at the same time. The <B>SET</B> screen will appear with the current low range limit displayed, and the number and range indicator arrow will flash.