Wrist Blood Pressure Monitor Machine for Home or On-The-Go, Wrist Cuff, LCD Display The device read out Result after diagnostic, Explained the result obtained and also let you know if you are healthy or not. Easy to use, Audible Main Function: Irregular heartbeat detection 120 sets memory group: For 2 peoples with date and time Measure range: Pressure: 20mmHg~280mmHg Pulse rate: 40-200times/min. Accuracy: Pressure: 3mmHg (within4kPa). Pulse rate: accuracy is 3% Display : Digital LCD Display Auto power off Operating temperatures: 10.0 to 40.0C Storage temperatures: -20.0 to 50.0C Size: 84*70*33mm Package contents: 1 x Blood Pressure Monitor 1 x English user manual Note: Needs 2 AAA Batteries not included