ACCURATE, RELIABLE, & QUICK READINGS | Clinically tested and proven consistent results. Receive blood SpO2, Pulse Rate, and Pulse Strength results within 8 to 10 seconds on large digital red LED display.(Battery not included) CALINE SpO2, PULSE RATE, and PULSE BAR GRAPH READINGS | Simple bar graph that displays your SpO2, Pulse Rate, and Pulse Strength results. CALINE SPORTS ENTHUSIASTS | Only for sport and aviation use. This device is ideal for using during high endurance sports activities such as mountain climbing, running, biking, etc.