The Finger Pulse Oximeter is a way to control affordable and accurate pulse rates and blood oxygen saturation levels. Self-adjusting finger clamp simpler than a button design allows for easy operation. Small portable size makes it easy to handle and transport. Suitable for daily use, it measures your health at any time.- Special designed, make the data look clearer- One key operation: No complex function, east to use, accurate data.- Two-direction display: 2 directions, allow you to view the results in different direction.Picture Frames And Display Items Content-1xFingertipOximeter (without battery)-1xLanyard-1xEnglish user manualBy aviation restrictions, batteries are not included in the package.