Features include stop watch between 10 to 100 hours (depending on the model), countdown timer, time control, heart rate training control, energy control, memory samples, lap time memory, EL screen light, ECG accurate heart rate, time in below and above target zone, interval timer, split time memory, changeable transmitter battery, time of day, calendar and alarm. So the first bond you would create with your child would start the moment you make contact with through the doppler fetal heart rate monitor. The doppler fetal heart rate monitor lets you know and hear the heart beat of the baby inside you while seeing the digital result on an LCD screen. It uses the same ultrasound technique that has been in existence and trusted by doctors for more than 3 decades so it is proven safe and effective. Since most of this type is designed for male users, women who wish to have the strap belt heart rate monitor during training can have difficulty fitting the right size for them. For the strapless heart rate monitor, the main advantage it presents is the convenience of wearing only the wrist unit. There is no need to wear the strap with transmitter. The Mio heart rate monitor also removes the probable risk of taking inaccurate reading since improper wearing of the belt can give user wrong heart rate reading. Mio heart rate monitor also has several features that are surely functional. Some of which include the readings on the maximum, minimum and average heart rate. In other words, without Nike heart rate monitor in hand, you are prone either to over-train or under-train. That is not all; Nike heart rate monitor also comes with several features that would give you more reason to exercise. The chest strap transmitter is designed to give total comfort while wearing it. This is because the strapless heart rate monitor requires the user to place two fingers on the monitor s sensor in a specific length of time usually between 4 to 13 seconds. And the reading would only activate if this is done. The electrical stimulation provided by the fingers that is sourced from the heart gives the strapless monitor the right reading on the heart rate.