Automatic Deluxe Blood Pressure Monitor, Wrist Gel For best results the battery 101044815 For best results the battery should always be stored full charged in a cool dry place when not in use Machine and mask setup tools guide you step by step from your first day while Test Drive gives you a chance to try out therapy so your first night goes as smoothly as possible The lightweight Drive Medical Digital Blood Pressure Monitor unites professional accuracy with simplistic design to ensure taking daily blood pressure readings is easy and efficient The World Health Organization indicator allows you to compare your blood pressure results with the global standard