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)