DJI Osmo Action review: specs and price

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

The waterproof depth rating indicates how well the device is protected against water ingress and water pressure. Devices which can withstand more water pressure are better for swimming or diving.

The bigger the screen size is, the better the user experience.

The device is dustproof and water-resistant. Water-resistant devices can resist the penetration of water, such as powerful water jets, but not being submerged into water.

The maximum temperature at which the device can perform to the optimal level.

The device has an electronic display to present information to the user.

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

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

Bluetooth is a wireless technology standard that allows data transfers between devices placed in close proximity, using short-wavelength, ultra-high frequency radio waves. Newer versions provide faster data transfers.

A remote control allows you to control the device remotely. The remote control can be included or optional.

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

You can use your voice to control key functions of the device and you can easily access your device without pushing any button.

Battery power, or battery capacity, represents the amount of electrical energy that a battery can store. More battery power can be an indication of longer battery life.

The time it takes to fully charge the battery.

The device's battery life (when in use) as given by the manufacturer. With a longer battery life you have to charge the device less often.

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

The battery can be recharged and used over again.

An indicator shows you when the device has low battery.

With a standard mini jack socket, you can use the device with most headphones.

More microphones result in better sound quality and enable the device to filter out background noise.

A microphone port allows connecting external high-end or specialized microphones.

The number of megapixels determines the resolution of the images captured with the main camera. A higher megapixel count means that the camera is capable of capturing more details. However, the megapixel count is not the only important element determining the quality of an image.

Optical image stabilization uses gyroscopic sensors to detect the vibrations of the camera. The lens adjusts the optical path accordingly, ensuring that any type of motion blur is corrected before the sensor captures the image.

With a higher light sensitivity (ISO level), the sensor absorbs more light. This can be used to capture moving objects using a fast shutter speed, or to take images in low light without using a flash.

With a wider aperture the sensor can capture more light, helping to avoid blur by enabling a faster shutter speed. It also provides a shallow depth of field, allowing you to blur the background to focus attention on the subject.

The larger the sensor the more light the sensor captures yielding in better image quality.

A faster maximum shutter speed allows taking pictures of fast moving subjects without blur.

The maximum resolution available for videos shot with the main camera. Although it may be possible to choose among other frame rates, those recordings usually have lower resolutions.

Slow-motion is an artistic video effect that makes time seem to go slower. It is achieved by recording a video at a higher frame-rate than the standard playback rate of 24fps or 30fps. Depending on camera capabilities, frame rates for slow-motion videos vary between 60fps and 960fps.

Field of view (FOV) is the part of the world that a device can view and record. A wider field of view allows you to capture more of the action.

With AF tracking, once you choose the subject and press the shutter release part way down, as the subject moves, the autofocus will follow it. No more out of focus shots.

The burst mode, also called serial shot mode or continuous shooting mode, allows you to shoot multiple photos in a row.

24p is a video format (24 frames per second) traditionally used in cinema. Nowadays, it is used to create film-like motion characteristics.

Pixel density is a measurement of a screen's resolution, expressed as the number of pixels per inch (PPI) on the screen. A higher pixel density translates into more clarity and sharpness for the images rendered on the screen, thus improving the quality of the viewing experience.

The maximum amount of external storage memory supported by the the device.

A wider field of view assures an immersive and realistic experience.

The DJ software supports external microphones hardware and often has a special control section for that.

An electronic viewfinder (or EVF) is a small display which shows the framed image. Benefits of these over optical viewfinders include: they show more of the image; they can be more compact; it's easier to focus with digital zoom; and they sometimes offer extra info on the display (such as a live histogram).