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The heart rate monitor is built into the watch. No need for any additional equipment. Just like fitbit.
Sorry, there was a problem. Please try again later.Its on the wrist. Optic sensor.
Sorry, there was a problem. Please try again later.On wrist
Sorry, there was a problem. Please try again later.The heart rate monitor is located on the wrist, there is no chest strap required. (SP)
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