[Clinically Accurate: Easy Operation by two buttons Advanced Accuracy No Calibration required. Large Multi-Color Backlit Display: The large oversized numbers make reading the results from this upper arm blood pressure monitoring device a breeze. Coded (GREEN/YELLOW/RED) display tells if your blood pressure readings are optimal or not. "Easy Management: Manage and track up to 99 readings on your blood pressure monitor and unlimited readings on your smartphone with iHealths free iOS and Android applications ( iOS 12.0 or later. Android 9.0 or later.Requires Bluetooth 4.0.and up)." Heart Rhythm Disturbances: This unit automatically identifies and alerts you to any heart rhythm disturbances. If detected a warning symbol will be displayed after the measurement is taken. What You Get: 1 x blood pressure monitor that meets ESH 2010 performance standards 4 AAA batteries 1 wide range cuff that fits upper arms with Circumference of 8.7"-16.5" (22-42cm)1 Instruction manual our worry-free 12-month warranty and friendly California-based customer service. Please carefully read the instructions manual before first use to ensure measurement accuracy.Please contact our friendly customer support team if you have any concerns about the device.]