Battery Operated - Operated by 4*AA batteries, perfect fit for bathrooms without power outlet. Low power consumption ensures a long service time. Meets mechanical standards for the US, cUPC listed. Contact Free Auto Flushing - 2 smart flushing modes: off seat auto flushing & foot kick button flushing (designed for men). Touchless operation, more hygienic. Powerful & Thorough Cleansing - Siphonic flushing technology, ensuring thorough and efficient cleaning. Tankless Flushing System - Low water pressure startup technology enable to flush the bowl with direct water supply from the pipe, applicable for residential house with low water pressure. Complete Installation Kit - Comes with everything you need for installation. 2 angle valves available: NPT 1/2" threaded & G15/16" threaded compression fitting. Choose one that suits your current water supply. Water-Saving - EPA WaterSense: 1.28 GPF (HET: 4.8L per flush). Item Dimension - Comfortable toilet seat height:17 inches (bowl height 15.35 inches), width: 16.14 inches, length: 27.16 inches. Rough-in Distance ≧12 inches. R&T Serving US since 2002: Since entering the U.S. market in 2002, we've been proud to bring smarter, greener bathroom solutions to American households for over two decades. R&T One-piece Modern Tankless Auto Flusing Smart Toilet for Bathroom