Product parameters Name: Finger clip oximeter Display: Color display Range of oxygensaturation: 70%-100% Pulse ratedisplay range: 30BPM-250BPM Battery model: 2 No . 7 batteries Dimensions: 58*34*32mm Weight: 26.5g ( Not including batteries ) Use Attention 1. To ensure the accuracy of the test results , readafter the indication is relatively stable 2. Use this product indoors whenever possible. 3. Keep away from strong light sources and infrareddevices when using. 4. Keep the instrument stable during use. 5. Replace the low battery in time for a better experence.