The Quantrex line offers increased power for greater cavitation and is backed by the most comprehensive warranty in the industry. Standard features include a stainless steel cover (Q140 comes with a plastic cover), automatic tuning and a pilot light. All Quantrex machines have earned worldwide approval-CSA, LA, TUV, FTZ, CE Mark, ISO 9001 and GS Mark, and meet all FCC requirements. 30-5-10 Warranty (30 months entire unit, 5 year corrosion, 10 year transducer). All units include stainless steel cover, timer & drain (with the exception of the Q90* - does not come with drain).