The Omron RS4 wrist blood pressure monitor accurately measures blood pressure and monitors hypertension. It has an LED position sensor and stores up to 60 measurements. It is easy to use, with a large display that allows a clear reading of the results and an indicator that the wristband is correctly positioned. It adapts to different body shapes thanks to its size, which ranges from 13.5 to 21.5 cm. Its small size and carrying case make it easy to carry.Dimensions: 9.3 x 6.2 x 2 cm (without wristband).Wrist circumference: 13.5 to 21.5 cm.Supplied with "AAA" batteries.Includes blood pressure recording book and instructions. 3 year warranty.