Vktech&reg; Healthy Sporty Watch Heart Pulse Rate Monitor Calorie Counter Watch 009 Built-in ECG Pulse Sensor requires NO chest strap Continuous Heart Rate Reading in a while with the indication of instant heart rate changing Exercise Heart Rate measure and Resting Heart Rate measure modes Analyst the Heart Rate and calculate the Calories Burnt after exercise Great complements for football, Yoga, Running, Ice skating, Step aerobics, Soccer, Squash etc.