Wrist blood pressure monitors can be accurate if used exactly as directed. However, these devices are extremely sensitive to body position. To get an accurate reading when taking your blood pressure with a wrist monitor, your arm and wrist must be at heart level. Also, there are wrist monitors now available that will only record a measurement when the monitor is held at heart level.
It's not uncommon for blood pressure readings taken at home to be different from those taken at your doctor's office. Wrist blood pressure monitors are difficult to validate for accuracy. I would suggest taking your wrist blood pressure monitor to your doctor and checking your blood pressure sequentially with both a standard upper-arm monitor and a wrist monitor in the correct position in the same arm at the same visit.
The world's smallest compact wrist monitor, Wrist Blood Pressure Monitor makes it easy to take a quick and accurate blood pressure reading almost anywhere. Simply wrap the cuff around your wrist and press Start. In seconds, your blood pressure and pulse are displayed on the large digital panel. The monitor's IntelliSense technology offers an automated level setting and electronic deflation control. You can store up to 14 readings in memory to track your heart health.