Garmin Vivosmart 4 (large) review: specs and price

Dustproof/water resistant at depth equal to or greater than 1 meter.

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.

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You can operate the device easily, by pressing the screen with your fingers.

Resistance to sweat makes it ideal for use while doing sports.

A heart rate monitor can help show your fitness levels, enabling you to calculate a suitable intensity of exercise.

An accelerometer is a sensor used to measure the linear acceleration of a device. A common application is detecting when a device changes between vertical and horizontal positions.

Your blood oxygen level is a measurement how much oxygen is reaching your muscles. It is important because low levels mean that you will become easily fatigued during exercise. The more exercise you do, the better your blood oxygen levels will become.

GPS enables global positioning, useful in map, geo-tagging or navigation apps.

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The device can measure the level of perspiration on your skin, indicating the level of intensity of your workouts.

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With a temperature sensor you can monitor changes in temperature to measure your exertion levels and avoid hyperthermia.

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It can detect changes in elevation, such as when you are climbing stairs.

It can track your sleep, such as how long you sleep for and the quality.

The device automatically detects when you start an activity such as jogging, saving you from entering it manually at a later time.

Your activity data is analysed to give you reports, available to view through the app or website. This allows you to see how active you have been and to help you make improvements.

Your sleep data is analysed to give you a report, available to view through the app or website. This allows you to see the quality of your sleep and to help you make improvements.

This is useful if you are on a strict training diet or if you are trying to lose weight. It can also help to boost your motivation.

The device syncs all of your data wirelessly, without the need for cables.

The device automatically syncs your data when in range of your computer or smartphone.

Bluetooth is a wireless technology that allows you to easily transfer data between different devices, such as smartphones, tablets and computers.

It is compatible with a range of Android devices such as smartphones and tablets.

It is compatible with a range of iOS devices such as iPhones, iPads and the iPod Touch.

NFC (near field communication) allows a device to perform simple wireless transactions.

With a longer battery life, you don’t have to worry about charging the device as often.

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An indicator shows you when the device has low battery.

The battery can be recharged and used over again.

The manufacturer offers a branded wireless charging kit. To charge the device, you simply put it down on its charging base.

The battery is removable and can be replaced by the user if broken.

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When your paired smartphone is running low on battery, the smartwatch will notify you.

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The device can wake you using vibration, so as not to disturb anyone else sleeping in the room.

If you get a notification such as a call or message, the device will vibrate on your wrist or make a noise to alert you.

It determines when you are in a light state of sleep and wakes you up within a set period of time before your alarm. This can allow you to wake up feeling fresher and more alert.

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The device detects when you have been idle for too long, and alerts you to encourage you to stay active.

With a stopwatch you can time yourself.

The device has a feature that allows you to find your smartphone if you have misplaced it.