The J4000W has a large 1 gallon internal water reservoir and provides 2 hours of continuous steam before refilling. Go from Preheat mode to full steam power in just two minutes. Has a flexible 7.5' hose for easy maneuverability on the job and an angled 9" aluminum steam head that concentrates steam into a targeted area for precise removal. Steam-resistant nitrile gloves included in each unit. (120 volt; alternate voltage available upon request).