【About this item】: ● Your smart sphygmomanometer -- Our blood pressure monitor adopts the intelligent pressure method, which can measure your blood pressure to a suitable value automatically according to your own blood pressure value. It can effectively reduce the discomfort caused by incorrect pressure, shorten the measurement time. ● One button measurement & accurate pressure -- One-click measurement blood pressure value, click the "START" button to measure blood pressure. Precision chip to ensure accuracy--Sophisticated core chip, upgraded algorithm, more accurate measurement results. ● Easy to Read -- This machine is with clear LCD display, large font display and multi-function menu for multi-purpose needs.It has blood pressure level display, which makes the measurement results more intuitive, and the tilt screen can intuitively help the elderly observe the pressure measurement results. ● Comfortable Wide Cuffs -- The cuff fits upper arms 22cm - 42cm, which is suitable for more people. ● 99 Reading Memory -- support 2 users with each 99 set data storage of data memory with date & time stamp, which can save the data separately. It can also display the average reading of the latest 3 groups of measurement results. ● Over pressure protection function -- This machine uses an intelligent stedown method to measure, when the pressure is over 295mmHg (20ms), it will automatically and quickly exhaust. ● Two power supply methods -- Support USB-DC 6V power supply and 4 * AA battery power supply. 【How to Use】: Step 1: Put your elbows on the table; The cuff height should be consistent with the heart; The palm shall be upward, Relax the body. Step 2: Press the "Start/Stop"key, the machine will automatically return to zero, arm with automatic start filling with air, the pump started to inflate the cuff, the screen will display the pressure changes in the cuff. In the process of inflation, blood pressure meter also detects the pulse, so the whole measurement process, please do not move the arm, keep the stationary state. Step 3: When the air in cuff reaches a stable pressure, pump stop inflating, the pressure cuff gradually decrease and will be diaplayed on the screen at the same time, the heart icon will flash. Step 4: After themeasurement, the machine will simultaneously exhaust and displays your blood pressure value and the pulse number. (Note: the machine will automatically save the blood pressure and the pulse number） Warm reminder: If you use the batteries to supply power, please pay attention to the positive and negative poles of the battery when installing them. 【Product Details】: BP range: 20-280mmHg BP accuracy: within ±3mm Hg (±0.4kPa) PR range: 40-199 beats/min PR accuracy: ±5% Operating voltage: 4.2-6V Size：one size Length：22-42cm Clock function: Set of year, month, day, hour, minute Low power testing: any working-state detecting low power, LCD displays " " symbol prompts low power Auto power off function: No action for 2 minute then automatic shutdown Unit Conversion: blood pressure units kPa / mmHg conversion (the default boot unit is mmHg) 【What You Will Get】: one Blood Pressure Monitor; one Blood Pressure Cuff(22-42CM) and a DC Power Supply Line; one Packing Box and User manual (the battery is not include in package)