(1). The Features of our Pulse Watch: Time and Calendar; Daily alarm and hourly chime; Chronograph(stopwatch)with split lap time; Exercise counter with automatic and manual ovemide calorie counter; Extemal Pulse mode for determining heart rate at any time. (2). The method of measuring: Tips on placing your finger on the sensor of the watch. Place your finger so that the sensor is covered by your fingerprint, not the fingertip. If you fingernail turns white, you are pressing too hard. Try pressing down a bit with your finger first, and then make adjustments until seeing the "TOUCH SENSOR"change to "PULSE" and small heart icon blinks. Then, it demonstrates that your pulse is being registered.