FREE POLAR STORAGE POUCH!!CHOICE OF COLORS!! PLEASE SELECT IN DROP DOWN BOX BELOWNEXT WORKING DAY DELIVERYWireless ECG accurate heart rate Polar Own Cal Heart rate displayed in % of max & bpm Target zones with visual & audible alarm Avg & Max heart rate of total exercise The FT4 is an entry-level heart rate monitor & replaces the ever popular F4 Heart Rate Monitor. It looks & works as a digital wrist watch with dual time zones, date of the day & alarm features. It also comes with a chest strap that measures your heart rate & transmits wirelessly it to the watch. Wear it when you go for a brisk walk, jog, or yoga session. An alarm will sound if your heart rate falls outside the desired zone which is a balance between cardiac safety & an effective workout.