Type Finger Clip Pulse Oximeter Display screen IPS color screen Measurement range 70 99 Measuring accuracy 80 90 error ±2 including 80 70 79 of error of plus or minus 3 Resolution Blood oxygen saturation ±1 Pulse rate Measurement range 30BPM 240BPM error ±1Size 58mm X 32mm X 32mmFeature Bright OLED Display And Multi Direction DisplayAdvanced dual OLED display technology helps user get a brighter sharper vision of the information from pulse oximeter Also user can see Pulse Rate bar graph and Plethysmograph in this OLED display Four direction display can allow user to view conveniently the tested result in any direction Accurate And ReliableFingertip Pulse Oximeter can accurately determine your SpO2 blood oxygen saturation levels and PR pulse rate after clinical and professional tests Fast SpO2 readings pulse measurements and display it conveniently on a large digital bright OLED display Alarm And Pulse Rate SoundWhen detecting your pulse the pulse oximeter will make sound which indicate pulse beating rate If the pulse oximeter has detected your pulse rate and SpO2 in a irregular condition the pulse oximeter will make a alert to warn the user to be care of their body condition Also you can set the limit by yourself and whether to enable the alarm sound effect Lightweight And Easy To UseLight and compact accommodates wide r ange of finger sizes User only need to put your finger in the finger pulse oximeter tested chamber the result wil