VERY ACCURATE READINGS - Our pulse oximeter has been clinically tested and consistently beat other pulse oximeters in terms of accuracy and reliability, it is found to be a fast and absolutely reliable gadget to use. It is ideal for the oxygen and pulse readings and has a very small error margin. ✔ SUITABLE FOR ALL AGES - This device allows for almost all sizes of fingers from children to adults due to the finger chamber design ✔ SPORTS ENTHUSIASTS - Intended for sport and aviation use. This device is ideal for using during high endurance and outdoor sports such as mountain climbing, running, biking. ✔ Oxygen saturation monitor shows real-time Pulse Rate, Pulse Rate Bar, and SpO2 level. Light Weight, Easy to carry & Accommodates a wide range of finger sizes. ✔ LOADED WITH ACCESSORIES - Package includes 2-AAA Batteries to power up the Pulse Oximeter, Neck/Wrist Cord, User Manual, plus no-hassle 1-year warranty and friendly customer service. Link :- https://santamedical.com/products/finger-pulse-oximeter-spo2-blood-oxygen-saturation-monitor-with-pulse-rate-measurements-and-pulse-bar-graph-digital-reading-led-display