Features:Three-Color LED Display Screen: Different colors indicate whether the user's reading is normal. Reaings are more intuitiveSmart Touch Botton-One Button Operation: Touch the switch, then you will get the accurate-readings automatically without further operationVoice Reporting & LCD Display: Clear voice broadcast and large LCD display during the measurement can prevent the elderly from being incapableRechargeable: Don't worry about the blood pressure monitors 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 effect2.Please allow 1-3cm deviation due to manual measurement Description:Power Supply: Lithiums BatteryAccessories: Main unit, manual, storage box, data cableRated Voltage: DC5VPower Supply: Internal 3.7V Lithiums BatteryPower: 1.5WCurrent: 300mALoad: 16 ohms (wristbands specifications)Package List:1x Blood Pressure Monitors