Inverter microwaves are equipped with a compact and efficient power supply that weighs only 500g. This makes the overall unit lighter, more portable and easier to move around for cleaning. The total unit weight has been reduced to approx. 18kg, 12kg less than the NE-1853. With Microsave Cavity Liner: Patented Cavity Protection System - provides total protection for the cavity, the roof, sides, back and base of a commercial microwave oven, saving not only hundreds of pounds in repair costs which are not covered by the manufacturer’s warranty, but also valuable time in keeping the oven clean and hygienic. For more details, please follow this link: http://www.cavityprotectionsystems.com/