It may or may not tell time but most likely, heart rate monitors do have time. Other basic features include backlights, digital display, and water resistance among others. Now, heart rate monitors are backed with functions and technology. Some of it includes more complicated data recording. Top models would record the lowest and the highest heart rate as well as the average heart rate and everything in between. Just make sure that you can use most of the features and not allow yourself to get confused on the complicated features and procedures of the heart rate monitor. Memory: To be able to record the data of your previous training, you should need a heart rate monitor that has a good memory storage capacity. But either you use the one with a transmitter or not, you need not compare because both can give you the heart rate data you needed. Some special Reebok heart rate monitor models come with a cruise control training system that would automatically personalizes your target zone. Meaning, whether you are in a beginner, mid-lever or high intensity level, the Reebok heart rate monitor would adopt to your fitness level. For a more functional heart rate monitor that can either maintain or improve your present health and fitness condition, there are the Polar F6, F6 female, F11, F11 female, F55, F55 female, and the F92ti to help you. All mentioned Polar heart rate monitors are suited for fitness conscious individuals who want to be guided during their daily workout and exercise. Here are the things you should know to better choose the right belt chest heart monitor: All belt chests should be worn while training, so the most important thing to consider is comfort. This depends on the fabric used. Choose one with soft fabric. This is more comfortable than any other material used on a belt chest. 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.