The doppler fetal heart rate monitor uses high frequency sound waves that lets you hear the sound of your baby s heart beat through an audible device sometimes an earphone or a speaker that is usually built-in on the heart rate monitor. In order for this wave to travel, the doppler fetal heart rate monitor is aided by particular liquid often a lotion, oil or water. Mio Heart Rate Monitor Story Aiming to have the best heart rate monitor that would give the best, most practical, and most comfortable, the founder of Mio surpasses what the present technology in her time provides. Mio, from the Italian word which means mine was founded by Liz Dickinson in 1999. The foundation was prompted by the necessity to have a heart rate monitor that would give her the best result in maintaining her normal weight after giving birth. It also does not mean you have to order immediately the particular heart rate monitor recommended by a friend. And, buying would not mean you have to take the top of the line heart rate monitor equipped with complete features and the latest technological breakthroughs. While these would be good reasons to buy your first heart rate monitor, it might be unwise. And when we talk about running we often talk about treadmills. Not only it provides a better tool to keep track of our training, treadmills give us the convenience of being inside a safe room. With treadmills, we would not require ourselves to wear training clothes suitable for the summer days. We will never have any reason not to run during winter days. They need something that could give them the exact status of their heart while on training. They need a heart monitor watch. Since knowing the status of the heart is very important in telling the effectiveness of the workout, monitoring the heart rate would be very important. This makes the checking of the wrist or the neck after the runner would stop his/her workout logical. 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. In many cases, discount heart rate monitors are found on special sites.