<b>Considerations</b><br><br> This device is for Sports & Aviation use only and not intended for medical use. <br>1.If the product cannot be opened, Please replace a new battery, this product require AAA betteries. Make sure the battery are a high quality brand alkaline battery.<br> 2.It worked well on baby’s foot , and its works perfectly fit an adult finger.<br><br> <b>What makes this Blood Oxygen Saturation Monitor outstanding among the others?</b><br><br> 1.This Blood Oxygen Saturation Monitor are produced by FDA certified manufacturer. Blood Oxygen Saturation Monitor must be highly accurate, stable and intolerable to mistake. This delicate BT Blood Oxygen Saturation Monitor for personal use is crafted by this manufacturer under the hospital grade at the same accuracy & stability level.<br> 2."All-in-one" integrated finger device<br> 3.Simple operation for immediate, real-time spot-check<br> 4.Cartoon upgrading design for pediatric and adult<br> 5.Can work more than 18 hours continuously<br> 6.Resistance to surrounding light and interference of man-made light<br> 7.Measurement at low perfusion<br> 8. Accurate measurement of SpO2&PR with anti-motion technology<br> 9. parameters:Digital SPO2, Pulse Rate, Pulse Bar, Pulse Waveform<br><br> <b>Specifications:</b><br><br> - SpO2 Measuring Range: 0% to 100%<br> - SpO2 Measuring Precision: ± 2%<br> - Pulse Measuring Range: 25bpm to 250bpm<br> - Pulse Measuring Precision: ±1 bpm<br> - PI Measuring Range: 0.2% to 20%<br> - PI measuring Precision: ±1%<br> - Power: 2 AAA betteries<br> - Weight: 55g (with batteries)<br>