Features: One- 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 effect 2.Please allow 1 - 3cm deviation due to manual measurement Description: Power supply: 4*AAA batteries (self- provided)