ITEM NAME:Automatic Wrist Blood Pressure Monitor LED Digital Display Screen + Voice Descriptio n Description: Digital pressure monitor with USB charger can be used 45-50 times with full power ,the Voice Broadcast and big backlight LCD display make the measurement much easier and more convenient. Automatic digital blood pressure blood monitor supports 2 users and 99 reading memories for each one with date and time stamp.With a touch of a button you can check your results and compare trends. It safeguard the safety of your family ,a perfect gift for your parents. Specifications: Parameters: Storage temperature: -20 ℃ ~ 50 ℃ Storage humidity: 15% ~ 90% Working temperature: 10 ℃ ~ 40 ℃ Operating humidity: 40% to 85% Display mode: LCD digital display Measurement method: pulse scanning / oscillometric Measuring range: hypertension / hypotension: 20mmHg ~ 280mmHg Pulse: (40 ~ 200) times / minute Accuracy:  ± 3mmHg ( ± 0.4kPa) Pulse: within  ± 3% of reading Voltage: 3V Package Included: 1X blood pressure monitor Note: 1.Due to the manual measurement and different measurement methods, the actual size could be slightly different. 2.Please be reminded that due to lighting effects and monitor's brightness/contrast settings etc, the color tone of the website's photo and the actual item could be slightly different. High quality buy, happy buyï ¼ Automatic Wrist Blood Pressure Monitor LED Digital Display Screen + Voice.Display mode: LCD digital display. Storage temperature: -20 ℃ ~ 50 ℃. Working temperature: 10 ℃ ~ 40 ℃. We want to make sure you are happy with our item. Goods without RMA number will NOT be accepted.