Features:<br />Accomodate wide range of finger size.<br />Measured after a little rest if you did strenuous exercise.<br />Blood pressure and oxygen should not be measured at the same time.<br />LED digital display,clearly show your blood oxygen saturation levels,pulse rate and strength.<br />Light weight for carrying and Easy-to-use. Manually adjust the direction of interface,LED display, simultaneous display for testing value and bargraph. Low Battery voltage indicator. Automatically standby or sleep.<br />Design for sports enthusiasts or anyone interested in measuring their blood oxygen saturation levels and pulse rate.<br/>Specifications:<br />Voltage: 2.6~3.6 V<br />Working Current: 30mA<br />Color: Black<br />Power Supply: 2*AAA alkaline battery (not included)<br />Package Weight: 40g/1.4oz <br /> <br/>Package List:<br />1* Manual<br />1* Pulse Meter (Black)