Features: LCD Display: The blood pressure monitor integrates data display and cuff in one. Intelligent digital LCD display, help you easy to read the measurements, date and time clearly. Function: Able to read systolic pressure, diastolic pressure and pulse rate, monitor of irregular heartbeat and blood pressure classification simultaneously. 2 x 99 Sets memory: Memory function, double mode, totally can store 198 readings automatically. It can storage historical measurements, help you record and monitor blood pressure changes. One-key Operation: Easy to operate for adults, young people and old people. Portable: It's portable, you can use it at anytime and anywhere. Specifications: Item type: Blood pressure monitor Material: Plastic Color: Black, White Voice: English voice Power supply: USB charging Battery: DC 5V rechrgeable battery(built in) Display: LCD digital display screen Memory capacity: Can memorize 2 x 99 sets of measurement data and time Measuring range: High/Low blood pressure 0~280mmHg, Pulse 40~199 times/min Measurement accuracy: ±0.4KPa(±3mmHg) Pulse: Within +/- 3% Resolution: 1mmHg (0.1kPa) Votage: 5V Power: 1W Storage environment: Temperature: -20 ~ 50 ℃; Humidity: 15% ~ 90% RH Operating environment: Temperature: 10 ~ 40 ℃; Humidity: 40% ~ 85% RH Arm band: About 22-32cm(adjustable) Main unit size: About 116 x 98 x 60mm(L x W x H) Package includes: 1Pc x Blood pressure monitor 1Pc x Arm band 1Pc x Instruction book 1Pc x Cloth bag Notes: Transition: 1cm=10mm=0.39inch 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 2. Please allow 1-3cm measuring deviation due to manual measurement.