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● Please tide the bracelet on the measuring arm as the picture shows (degree of tightness as a finger as fitting), and let the air tap the wrist.
● About 2-3 cm (about a finger width) arm circumference size is 22-32 cm
● Ensure that the bottom edge of bracelet is about more than 2-3 cm away from elbow joint, and let the air faucet is in the arm inside.
● Please sit for 5 minutes in silence as the photos before measuring
● Put the arm on the desk flat, upright with your palms up
● The center of bracelet should be with the same height of heart
● Be noted that the air tube of bracelet can not be turned or bent
● Press OP button to measure
● It is not suitable to measure after meals, exercise and with emotional excitement.