I chose this option even though it costs $8 more than the other options because the picture shows the shape is the same as the unit itself. I regret mine total choice. As you can see from the photos, the cover is NOT what is shown in the Amazon gallery. You will receive the one pictured in the description much further down. The picture with the white background is what was advertised and the picture on top of the bin is what I received. As you can see in the picture of what I received it has an odd top point that sticks out over the unit as it is VERY loose. The dust cover should NOT be so loose, otherwise dust will get inside. As for the weird triangular dot at the top, I see no reason why anyone would make them that way. I checked and it doesn't allow you to cover the device when the top is open. All of this is a waste of space. I will replace it with a department from another company. Although I get the same, it will be at least $8 less.