Health and Beauty Measuring devices Omron Rs4 Electronic Tensiometer The Omron RS4 electronic wrist blood pressure monitor is designed to measure blood pressure and pulse rate. It was designed primarily for home use as part of a medical check-up, usually requested by a GP. The bracelet is designed to fit all body types (size between 13.5 and 21.5 cm). The Omron RS4 electronic wrist blood pressure monitor works according to the principle of oscillometry. It is an easy-to-use automatic measuring instrument and its small size makes it an ideal tool to carry around. For comfortable and controlled inflation without pre-adjusting pressure, the device uses advanced "INtellisense" technology. The device can also detect irregular heartbeat, when it does, an icon will appear on the screen to alert you. The motion detection feature on the device also lets you know if you have moved during the measurement and therefore need to take a measurement again to ensure a reliable result.