Adjustable Wrist Cuff – Comfortable, soft fit for wrist sizes from 13.5 to 19.5 cm (5.3" – 7.7"). 1x Digital Wrist Blood Pressure Monitor. Blood Pressure: 0–300 mmHg. Blood Pressure: ±3 mmHg. Automatic Inflation & Deflation – Simple one-button operation, ideal for users of all ages and experience levels.