Battery low symbol (battery icon blinking) → replace all 4 batteries.
Tip: Remove batteries if not using the device for >3 months. Omron m4 hem 722c1 e manual
The Omron M4 (model HEM-7221-C) is an upper-arm digital blood pressure monitor designed for accurate, at-home measurement of systolic and diastolic blood pressure and pulse rate. It uses an oscillometric measurement method and includes features to help detect irregular heartbeat and average multiple readings. This guide covers setup, cuff fitting, measurement steps, interpreting results, maintenance, troubleshooting, specifications, safety, and tips for consistent readings. Battery low symbol (battery icon blinking) → replace
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