Some have backlights while some have none. Most are water resistant and shock resistant. These basic features might appear on every heart rate monitors on the market so you will not have any problem in these areas. Expanded features: While it is advisable for beginners to get the basic heart rate monitor and work from there, others might be very eager to try higher-end heart rate monitors with calorie counters, built-in training program, and built-in trainer-like features that would guide user throughout the whole training, the choice is still up to you. The electronic impulse coming from the finger would be the source of data that the heart rate monitor would use to determine the heart rate. Since this is the process, the Reebok strapless heart rate monitor provides an in demand only reading. This is different from the usual chest worn heart rate monitors that would give heart rate reading from start to finish. Most of the manufactured heart rate monitors today are composed of two major parts: the chest strap and the wrist unit. The chest strap acts as the transmitter to which the heart rate is measured. The data is then transferred to the data to the wrist unit. The wrist unit on the other hand receives any data the transmitter sends. This is the reason why people exercise and the first type of exercise they do is running. And who would not agree? Running is the best form of exercise for it enables the every muscle to move. 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. This is very reasonable since Nike has been in to sports for a long time. And with the length Nike has been in the market offering top quality sportswear such as shoes, shirts, and pants, and equipments such as bags, different kinds of sports balls, and others from different sports arena, it is just right that the company would also give its consumers the right fitness companion. Since, there was no time to read product level on eat food she buys, there was a great need to what she thought a device that would lessen the worry and reduce the time wasted on check what food to buy and what s not. Not only that. Thought that the regular strap heart rate monitor was too uncomfortable to wear and an alternative must eliminate the strap.