switch off the device and remove the  battery

Shields from dust

Light Bulb Type  Incandescent

It is secure enough to absorb kinds of steel plate

an adjustable shelf on both sides

2-Shelf Economy Bookcase - Gray switch off the device and2 Shelf Economy Bookcase Gray Economical, sturdy, and strong with the ValueMate Bookcases you can't go wrong The shelf and exterior of the bookcase are constructed of steel and the back is made of solid fiberboard. Attractive, plastic snap in radius corners make assembly easy and add to the overall strength of these units. Generous 12" deep shelves accommodate 3 ring binders and large publications. Includes two shelves. Gray finish. Weights &