Features:1.Intelligent voice and convenient operation functions. 2.Suitable for all age groups from children to the elderly. 3.Power: AAAA batteries(not included)/usb charging for choose 4.Adapters: Product accessorries do not include adapters, mobile phone adapters can be used.Packing List:1 x Blood Pressure Monitor (without battery) 1 x English user manual 1x cloth bag 1x color boxSpecifications:Product size: 15.00*20.00*15.00CM (excluding arm belt) Operation temperature: 10 DEG ~40 DEG Operation humidity: 40%~85% Display: LCD digital display Measurement methods: pulse scanning method / oscillographic determination method Measuring range: high blood pressure / low blood pressure: 20mmHg~280mmHg Pulse: (40~200) / min Resolution: 1mmHg (0.1kPa) Accuracy: + 3mmHg (+ 0.4kPa) Within the pulse: read value + 3% Voltage: 3V Power: 0.01W