Standard Touch Screen PLC Control and Standard Dryer Features That Others Call Options! PLUS 5-Year Warranty on ALL Models. The NWB-PLUS packages include a 7" high resolution color touch screen PLC with advanced features like OverDry Protection, photo assisted diagnostics, trending and data logging. If you just need a basic portable dryer model, choose the NWB with a 4" color touch screen PLC without the advanced. All models have a 5-Year warranty.