The ITW GSE 5400 gasoline-powered GPU is the first of its kind to run at variable speed. This reduces NOx and other emissions at the airport. The 5400 is among other equipped with ITW GSE's Plug & Play voltage compensation system that provides an optimal output voltage at the aircraft connector, right where it matters. And the ITW GSE 5400 can handle sudden changes in power requirements without jeopardizing the output voltage and frequency thus eliminating delays caused by power dropouts.