EASY TO USE iHealth Track wireless blood pressure monitor syncs to your smartphone or tablet over bluetooth with simple, one step setup; automatic storage of every reading in the device with time and date to track health over time. ACCURATE 510K cleared and clinically validated for accuracy. Upper arm measurement is considered gold standard for accurate BP readings -that's why health professionals measure BP the same way. WIDE RANGE CUFF iHealth Track Wireless Blood Pressure Monitor (Blood Pressure Cuff) fits upper arms with Circumference of 8.7"-16.5" (22-42cm). So most of people do not need to buy extra cuff for usage. NO MORE PEN AND PAPER Free and friendly iHealth Myvitals App automatically tracks all measurements after uploading the data ; integrates with Apple Health for iPhone or iPad and Samsung Health for Android devices. DATA SHARING Share your data automatically with family, or send your results via email to the doctor from our secure iHealth cloud. - 510K Cleared and Clinically Approved for Accuracy - Works With iOS 10.0 or later, Android 4.4 or later - Requires Bluetooth 4.0 -Dimensions: 3.9” x 3.9” x 1.6“ (98 mm x 98 mm x 46 mm) -Cuff circumference: 8.7″ – 16.5″ (22 cm – 42 cm) -Weight: 1 lb (armband + batteries included) - Includes 4 AAA Batteries (no charging, no cables) - 1 YEAR WARRANTY