Hop over to Walmart and get a deal on Fingertip Pulse Oximeter, Digital Reading LED 4 Colors Display. It delivers accurate SpO2, pulse rate, and pulse strength readings in just 8 seconds. Its lightweight, portable design features a large OLED backlit display, one-button operation, and automatic shut-off for convenience and energy efficiency. Made with a … Continue reading Fingertip Pulse Oximeter, Digital Reading LED 4 Colors Display $2.99 (Reg. $19)