The Airial BP2400 is a device that helps in monitoring blood pressure. It is very easy-to-use. Each unit is uniquely designed to be patient friendly. It has a large display for easy reading. The multiple user modes provide memory input for each patient and helps in recalling previous readings. The product includes 2 alkaline "AAA" batteries. Features: 1. Large Easy-to-Read screen. 2. Date & Time Display 3. One Touch Operation 4. Irregular Heart Beat Detection 5. World Health Organization Classification 6. Pulse Rate Indicator 7. Four User Memory Capablity 8. Auto-Off Function 9. Travel Case Included 10. 2 Year Warranty