Wrist blood pressure monitors work by measuring the vibration of blood flowing through the arteries in the wrist, then converting that to a number that indicates blood pressure. They might also show your heart rate.A person can measure their blood pressure at home with a wrist blood pressure monitor. These devices may be useful for people with high blood pressure as they can take regular readings and help an individual manage blood pressure accordingly. It may also be possible to share monitor results with a doctor if necessary.