Tips:<br /><br />USA  Buyer:  ship from USA warehouse . Fast delivery (3-5 days) ;<br /><br />Other Buyer : ship from China Warehouse. 2-3 weeks delivery.<br /><br /> Product Notes<br />Compact size、 light、 and convenient to carry<br />SPO2 and PR display、 and bar graph display<br />Power off automatically when not used after 10 seconds to save battery power<br />Integrated with SPO2 probe and processing display module<br />This finger pulse oximeter will not monitor SPO2 during active movement. You must stop the your current activity and take the reading while in a stationary position.