The Blue Jay Elite Healthcare Products Perfect Measure Wrist Blood Pressure Monitor Is Lightweight Portable Convenient Accurate And Simple To Use * Users Can Easily Check Their Blood Pressure With This Handy Wrist Blood Pressure * Accurate Results Detected By Oscillograph * One-touch Function * Irregular Heartbeat Detection * 90 Memory Recall With Date And Time Stamp * Automatically Powers Off To Help Extend Battery Life * Lcd Screen Display * Who (world Health Organization) Bp Classification Indicator * Average Of The 3 Most Recent Measurements * Cuff Fits Wrists 6.1 - 9.8 In Circum. * Runs On 2 'aaa' Batteries (not Included) * 1 Year Warranty