Our 24-Unit Laptop Carts store and charge up to twenty-four laptop computers. Top shelf features a non-slip rubber mat and a grommet hole at the back for cord management and electrical unit access. Two 14-outlet surge and overload-protected electrical units are mounted in the front or rear of the cart. Perforated doors and rear and side panels allow for ventilation of equipment when charging. All carts have been certified to conform with UL 60950 standards for Safety of Informational Technology.