Doctors' Choice Pulse Oximeter is designed to quickly and accurately measure pulse rate and SpO2 blood oxygen saturation levels. The large digital LED display provides clear and easy-to-read results from multiple viewing directions. Its rotating multidirectional display allows convenient viewing of SpO2 levels, pulse rate, pulse waveform, bar graph, and battery status from different angles. The oximeter requires 2 AAA batteries, which are included in the package, and automatically powers off after 10 seconds of inactivity. It can operate continuously for more than 20 hours, making it suitable for regular monitoring at home or on the go. Each device undergoes rigorous testing for reliable performance. The package includes 1 x Pulse Oximeter, 1 x User Manual, 1 x Lanyard, 2 x AAA Batteries, and 1 x Warranty Card, along with a 6-month warranty.