This shows the lifespan of the light source. Beamers need to have their lamps (light source) replaced every now and then.
Audible noise is the noise that a device produces while in operation. Reduced audible noise improves quality.
We consider a lower weight better because lighter devices are more comfortable to carry. A lower weight is also an advantage for home appliances, as it makes transportation easier, and for many other types of products.
The width represents the horizontal dimension of the product. We consider a smaller width better because it assures easy maneuverability.
5.power consumption in standby mode
The power consumption in standby mode, also called energy-saving mode, measures the amount of power the device consumes when shut down but still plugged in.
The height represents the vertical dimension of the product. We consider a smaller height better because it assures easy maneuverability.