Most doppler fetal heart rate monitors are battery operated, lightweight, and very portable so you can carry it wherever you go. Some are also compatible with any PC so you can track and record every detail you would get from the monitor. With the doppler fetal heart rate monitor, you can now experience the connection with your child safer and earlier than you can expect. These include calendar, time of day, the current, lowest, average, and maximum heart rate, plus the percentage of the maximum heart rate, target zones, exercise functions, and more. More there is a need to monitor the previous training records, Reebok heart rate monitors add memory as a feature. The memory would be able to record the minimum, average, and the maximum heart rate, the average heart rate per lap, and the time during, below, and under the target zone. Higher end belt strap heart rate monitors can be computer compatible or contain high memory storage capacity that equates to larger room to save data for several days of training. Its main disadvantage on the other hand could be the inconvenience the strap provides on the user. Since most of this type is designed for male users, women who wish to have the strap belt heart rate monitor during training can have difficulty fitting the right size for them. Treadmill heart rate monitor is a device that is attached on a treadmill as an added feature. It monitors the heart rate similar to a typical belt heart rate monitor and wrist heart rate monitor. The only difference is that, the treadmill heart rate monitor is attached on the treadmill and could not be carried around wherever you want. There are still the date and time display, the stopwatch or the countdown timer, alarm, calendar, calorie counter, fat counter, backlight, and more. Reebok strapless heart rate monitor never loses the accuracy of telling the present, average, maximum, and minimum heart rate. You may worry about the need to be interrupted during training for it requires you to stop and place your fingers on the device just like the manual method but the convenience it would bring and the freedom to move in whatever ways you want to without worrying about the strap is far better deal with the Reebok strapless heart rate monitor. Meaning, whenever the user would wish to check his/her heart rate, he/she can have it and would not require to use the conventional manual method. This principle of being able to access the heart rate without using the manual method still applies on the strapless heart rate monitor. But there is a great difference.