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The Activity Timer will run for as long as the wrist monitor is “on” and receiving good signals from the chest sensor for a maximum time of 48 hours. NOTE: To view the current time of day, press SET/TIME to peek at the time and then return to the Heart Rate display. 5. END YOUR WORKOUT: Once your exercise is done, press and hold ON/OFF to turn off the wrist monitor, and the text “HOLD TURN OFF” will appear on the display one word at a time. The wrist monitor display will now read the Time of Day