An oximeter is a painless and reliable way to measure blood oxygen saturation level (SpO2) and pulse rate at home. This is a portable digital fingertip pulse oximeter and its digital display makes it easily readable and easy to use. Available in the USA. Sold unimprinted. Limited stock only. First come first serve. Features Dual color OLED display Automatically power off 2 AAA Alkaline or rechargeable batteries Operation time: about 30 hours under normal conditions Specification SpO2 Measurement range: 70-99% Accuracy: @80%-99%, ±2%; @70%-79%, ±3% Resolution: ±1% Pulse rate Measurement range: 30-235 BPM Accuracy: 30-100: ±2 BPM; 101-235: ±2% Resolution: ±1 BPM For General Public Use Only (Non-Medical Use) Note:SHIPPING NOT INCLUDED.