AstraPulse 3i pulse oximeter features the latest technology in a compact, ergonomic pulse oximeter design. Its performance, accuracy and reliability in day-after-day use makes it ideal for your portable monitoring needs. The state-of-the-art multicolor Organic LED display affords crisp bright readouts that can be adjusted to suit your needs. You have a choice of three different ways of viewing SpO2 and Pulse Rate including a Plethysmograph or line waveform for oxygen saturation. If you're looking for a pulse oximeter that delivers maximum performance in a lightweight package for a truly affordable price, the AstraPulse 3i is the pulse oximeter of choice. Compare with others. The 3i is a great value!