Omron INTELLI SENSE HEM-711AC Instruction Manual page 22

APPLYING THE ARM CUFF
3. Apply the cuff to your left upper arm so the blue arrow is centered on
the inside of your arm and aligned with your middle finger. The air
tube runs down the inside of your arm. The bottom of the cuff should
be approximately 1/2" above your elbow.
4. Wrap the cuff firmly in place around your arm using the closure strip.
1/2 inch (1 - 2 cm)
Blue Arrow
22
Air Tube