Microsoft HoloLens review: 20 facts and highlights

The device can track the movement of your eyes and your gaze, making it easy to interact with the content.

Devices with integrated audio are more convenient to use, as you don't have worry about connecting headphones or microphones.

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

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

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

The device can track your position in space and warn you if you are about to hit something.

The gesture control function allows you to manipulate virtual objects.

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.

A gyroscope is a sensor that tracks the orientation of a device, more specifically by measuring the angular rotational velocity. Initially, they were built using a spinning rotor to detect changes in orientation, like twisting or rotation.

As your head moves, the images move in real-time, assuring a realistic experience.

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.

Wireless devices allow users more freedom of movement.

The device comes with a game controller.

Cameras are used for optical tracking and/or recording videos.

Newer USB versions are faster and have better power management.

More HDMI ports mean that you can simultaneously connect numerous devices, such as video game consoles and set-top boxes.