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Rossmax Fingertip Pulse Oximeter - SB200× 3-in-1 Oximeter× Blood Vessel Blockage Detector× SpO2 Monitor× Heart Rate MonitorRossmax指尖脈搏血氧儀 - SB200× 3合1血氧儀× 血管阻塞檢測儀× 血氧含量監測儀× 心率監測器What does it measure?它能測些什麼？ 1. Blood Vessel Blockage Risk Levels:   1) Excellent blood circulation   2) Good blood circulation    3) Aver..