A good heart rate monitor is coded for it does not interfere or is not prone to interference to other monitors which could result to inaccurate readings. With all these, getting the best heart rate monitor should come within you. You should be able to know what are the features you need and what are the features you don t. The Timex heart rate monitor precise measurement makes it a great companion of athletes, trainers, and fitness enthusiasts. Key to this precision is the use of FM technology. Understand that a typical heart rate monitor is composed of two parts: the receiver and the transmitter. The transmitter is the one that is worn of the chest. 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. These sites could offer discount heart rate monitors because they could get directly from the manufacturers on discounted price. And by bulk, discount heart rate monitors are given much lower prices on special cases. There are other sites that can give much lower priced heart rate monitor. In most cases, groups such as the police and fire departments could get discount 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. Most doppler fetal heart rate monitors are battery operated, lightweight, and very portable so you can carry it wherever you go. The chest strap transmitter is designed to give total comfort while wearing it. The receiver is designed in such a way that it would look good on every user. The display is in the right size so as even if you re moving, it would be readable. Other feature includes programmable target zone, calorie counter, an alarm, lap timer, clock, and calendar.