[Features] This wrist-type intelligent voice electronic blood pressure monitor features portability, ease of use, and a large, clear LCD screen. The wrist-type electronic sphygmomanometer is sensitive, so you should maintain the correct sitting posture during the measurement process and continue breathing even after 5-10 minutes of rest. The measurement site and the heart site should be at the same level. Under normal circumstances, the wrist measurement is higher than the heart, the blood pressure will be lower, and lower than the heart will be higher. See the specifications and product manual for details; [Specification] Weight: 105 grams Product size: 70 * 72 * 23 mm Wristband range: 135 ~ 195mm Display: LCD digital display screen Measuring range: blood pressure 0 ~ 280mmHg, pulse rate 40 ~ 199 times / min Pressurization method: automatic pressurization by air pump Decompression method: solenoid valve control decompression Measurement error: blood pressure ± 3% of heart rate ± 5%