Blood pressure measurement is done with a simple push of a button. Usage: Place the cuff on your upper arm. Press the middle button and after 35-40 seconds the large screen will show your blood pressure and pulse. The blood pressure monitor is extremely quiet both when inflating and deflating the cuff. Power supply: The device is powered by 4 AAA batteries (not included). It automatically turns off after 10-15 seconds of inactivity. The power adapter (wall adapter) is NOT included in the package, but the cable is included. It can be connected to any mobile phone charger with a micro USB connector. Specifications GENERAL FEATURES Body area Arms Type of use Household Operating type Electronic Function Portable Automatic shutdown Usage history Package contents 1 blood pressure monitor 1 x Cuff 22-32cm - User manual; Color White TECHNICAL FEATURES Maximum number of measurements 99 Connection USB Systolic measurement range 0 - 280 mmHg Diastolic measurement range 0 - 300 mmHg Power type Batteries To the network Battery type Nimh Batteries required 4 x AAA (not included) Specifications Blood pressure: 20 - 280 mmHg with an accuracy of +/- 3 mmHg; Pulse: 40 - 199 bpm with an accuracy of +/- 5%; Adjustable cuff 20 - 34 cm; Remembers 99 positions for 2 users, a total of 198 memories so you can check your history. MEASUREMENTS Cuff circumference Cuff 22-36 cm Easy Cuff Cable length 30 cm Color: White As shown in the picture