Office Marshal Black Polycarbonate Office Chair Mat - 36" x 48" - Hard Floor Protection - No-Recycling Material - High Impact Strength Toys & Games The usb is to power

The usb is to power the led light

large area lighting etc

the brightness also can be adjust

If you are not happy for any reason

Waterproof IP65 and no worries about sun

Office Marshal Black Polycarbonate Office Chair Mat - 36" x 48" - Hard Floor Protection - No-Recycling Material - High Impact Strength Toys & Games The usb is to powerTHICK & STURDY: Made from long life polypropylene, these chair mats are thick and sturdy yet very pliable to prevent cracking or shattering. Office Marshal's polypropylene range combines premium floor protection standard with prices that you can afford EFFECTIVE GRIP: Underside holds the mat firmly in place on all hard floors EFFORTLESS ROLL, STABLE GRIP: The unique surface texture allows your office chair to move easily while carrying out daily