Multi-function: Digital pulse oximeter can be used to measure pulse rate, blood oxygen saturation levels accurately. Easy to Read: Support SpO2, pulse rate and bar chart, you can view the result very clear with LED display. LED Display: Low power consumption, LED clear display, 2 directions can be adjusted for conveniently reading. Convenient and compact, portable for home or travel use. Easy to Use: Accurate and reliable, one button operation. just clip it on to your baby's finger and turn it on at the press of a button. Automatic power off after 8s when not in use. Rechargeable Battery: Built in rechargeable lithium battery and Type-c charging port. Avoid frequent trouble of battery replacement.