Features: Three-Color LED Display Screen: Different colors indicate whether the user's reading is normal. Reaings are more intuitive Smart Touch Botton-One Button Operation: Touch the switch, then you will get the accurate-readings automatically without further operation Voice Reporting & LCD Display: Clear voice broadcast and large LCD display during the measurement can prevent the elderly from being incapable Rechargeable: Don't worry about the watch dying on you from a low battery. This monitors is chargeable by a USB cord, just like a cell phone. Easy to Use: Automatic blood pressure device will give you clear, accurate-data by pressing just one button in less than 30 second. 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 Power Supply: Lithiums Battery Accessories: Main unit, manual, storage box, data cable Rated Voltage: DC5V Power Supply: Internal 3.7V Lithiums Battery Power: 1.5W Current: 300mA Load: 16 ohms (wristbands specifications) Package List: 1x Blood Pressure Monitors