oxygen Therapy equipment and supplies
Large Easy to Read LED Display. Measuring range for SPO2: 35-99% and Pulse Rate of 30-254 BPM PR display mode bar-graph display, Low power indicator, and string tether (included), Battery requirements Two AAA 1.5V Alkaline Battery (included) Resolution: ±1% for SPO2 and ±1BPM for Pulse Rate, Measurement accuracy: SpO2: 80%--99%, ±2%; 70%--80%, ±3%; =70%, no definition. PR: 30--235 BPM, ±2% or 2 BPM, Automatic power off: When no finger in the device for 8 seconds, it will power off automatically to save battery life.