The belt strap reads the heart rate measurement and acts as a transmitter. The wrist unit serves as the receiver and displays the data sent by the transmitter. The belt strap heart rate monitor and the strapless heart rate monitor can be used during training. Both have similarities but both present advantages and disadvantages. Determine if you are using it for swimming, biking, running, or plain exercising. This would greatly narrow down your list of possible heart rate monitor. For beginners of course, there are particular heart rate monitors that are not complicated and not expensive. For more advanced users, there are several selections of heart rate monitors that would answer the demands for features. 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. Most doppler fetal heart rate monitors are battery operated, lightweight, and very portable so you can carry it wherever you go. Although treadmill will give us the total body workout, treadmill is incomplete without the device that gives us report, not on the length we are going but the rate our heart is performing. Yes! Treadmill should have the heart rate monitor. Treadmill heart rate monitor is a device that is attached on a treadmill as an added feature. 5 Advantages of Wristwatch Heart Rate Monitor Heart rate monitor has been around for quite some time but during its early years, it does not create much impact in terms of popularity and functionality. Not until technology backed up the device. Today, heart rate monitor is more popular than ever. And its patrons are from people who want to be more precise in monitoring their heart rate for more efficient training, to people who simply want to enjoy the functions of the device. Newer version could have little difference with the discounted unit. Discount heart rate monitor in this case may be an old stock but still fully functional complete with features that are right for your needs. You just have to bear with it but who cares, as long as it is discounted and suite your need it is always okay.