Dustproof/water resistant at depth equal to or greater than 1 meter.
Resistance to sweat makes it ideal for use while doing sports.
The device has an electronic display to present information to the user.
These devices will not experience water damage, e.g. in the shower. Devices which can withstand more water pressure are better for swimming or diving.
Polar RCX3 GPS
This measures barometric air pressure. It can predict weather changes, for example a sudden drop in air pressure could mean a storm is coming. When calibrated correctly it can be used to determine altitude, which helps GPS devices to lock on quicker and with greater accuracy.
A compass is useful in games, map and navigation software.
It can detect changes in elevation, such as when you are climbing stairs.
An indicator shows you when the device has low battery.
The battery is removable and can be replaced by the user if broken.
Your tracking data is uploaded via your smartphone or computer, and is available to view on the manufacturer’s online portal in the form of reports and graphs.
With a stopwatch you can time yourself.
Friends using the same app can be integrated with your account, allowing you to compete with them. This increases your motivation and makes it more enjoyable.
An altimeter can track elevation, ascent and descent using GPS or air pressure. It is particularly useful if you travel on hills or mountains.
It can provide you with information about the likelihood of a thunderstorm. This could be very useful to plan your day.