Easy to use: With a one-button operation, you just need to press the START/STOP button, it will measure your blood pressure and heartbeat within 1 minute. High-precision, blood pressure3mmHg, pulse5%Convenient to read: DOUHAO Blood Pressure Monitor with a large LED-backlit display and large fonts offers clear reading at night for advanced accuracy measurement, especially suitable for the elders use240 sets memory for 2 users: Our bp monitor can store up to 240 readings, with the date and time stamp. It also has the last 3 groups average value function, a good choice for tracking families' healthComfortable measurement experience: Our blood pressure monitor with a big size cuff 22-40cm/ 8.7-15.7in, comes with cuff self-checking function. Free adjust to fit your upper arm and get accurate measurement readingsDual ways to power: DOUHAO bp meter supports 3AA batteries and USB-C cord charging, never worry about replacing batteries frequently. And with a portable carry bag, it is suitable to keep tracking your healthy when traveling or working. (Batteries and AC adapter is not included)