The Panasonic EW3153W Upper Arm Blood Pressure Monitor lets you measure your blood pressure whenever and wherever you wish. It's ideal for anyone who wants or needs to keep careful track of their blood pressure over a period of time. You can trust Panasonic healthy living products to help you monitor your physical health in the comfort of your own home. Their range of blood pressure monitors are among the most popular on the market because they're reliable, easy-to-use, and accurate. You can measure either arm and place the wireless display where you can easily see it. The main unit and wireless display communicates via infrared signals. These signals are sent from the main unit , bounce back off your body and are picked up by the wireless devise. The wireless display is portable and can be taken to the doctors office where the stored data can be easily viewed.