FeaturesOne-button easy pressure measurement, abandoning difficult to learn complex operations.Easy to Read: The large digital display on the screen is convenient the elderly to watch, and presbyopia can be seen clearly.Adjustables Large Arm Cuff: Adjustables and fits for most standard and large adult arm sizes, easy to put on and take off by one person.ACCURATES MEASUREMENT EASY TO USE: Digital filter technology makes monitors quickly highly accurately identify systolic pressure, diastolic pressure and heartbeats-rate. Portable: This electric automatic wrist monitors is more compact and portable, convenient for checking blood pressure anytime and anywhere.Notice:1.Actual color may be slightly different from the image due to different light effect2.Please allow 1-3cm deviation due to manual measurement Description:Power supply: 4*AAA batteries self-providedPackage List:1x Arm Style Blood Pressure Meter