1.1 inches Digital Finger Pulse Oxygen / Oximeter - Grey + Black (2 x AAA) $13.6 👍 Health & Beauty General Shade Of Color Black Material PVC Quantity 1 set Specification Display LCD Screen Power Supply 2 x AAA batteries (not included) Power Adapter Without Power Adapter Other Features Certification Monitor resolution: 96 x 64; Measuring range: 35~100%; Precision: 70~100%, +/-1%; Pulse measuring range: 30~250bpm (resolution: 1bpm), precision: +/-2bpm; It can display correct SpO2 and pulse rate when pulse fullness is 0.4%, error of SpO2 is +/-4%; Power consumption: lower than 30mA; Working voltage: DC 3V; Battery working time: min 20h, 32h in theory Other Features Simple and easy to use, just put your finger in it, measuring result will show on the monitor; Oxygen content in blood should be 94~100% under low altitude and 60~100times/mins in static; If your measurement is beyond above result, please measure 2~3 times during a day; Small, lightweight and portable; Low energy-power; Battery volume indicating; Display SpO2; Display pulse rate value, bar graph and pulse wave; Can change displaying direction; Auto power off after finger left for 5s; Quality, get CE and FDA certification; Two years warranty period; Suitable people: People with heart disease, high blood pressure and diabetes, especially old people, pregnant women, people with respiratory disorder, eople always on business and travel lovers, busy workers and people often work over time, people often go to fitness; Camping, outdoor sports and outdoor exploration lovers, workers under sealed environmental, professional athletes Package Weight:0.066kg (0.146lb) Package Size:10cm x 10cm x 10cm (3.94in x 3.94in x 3.94in)