The Zacurate 500DL Pulse Oximeter accurately measures SpO2, pulse rate, and pulse strength in 10 seconds, displaying results on a large LED screen. Suitable for sports enthusiasts, it accommodates a wide range of finger sizes with its SMART Spring System. Includes 2 AAA batteries, a silicone cover, and a lanyard. Comes with a 12-month warranty and USA-based tech support.