High Efficiency Dual FlushEnjoy dual flush capabilities with 1.1/1.6 gallons per flush; the powerful siphon flushing system achieves a MaP score of 1000 grams to prevent clogging.Double Cyclone Flushing SystemDouble cyclone flushing system: Fast and powerful flushing by double nozzle holes instead of traditional rim holes, with more efficiently and powerful flushing function,easier cleaning.360 degree quite & Fast Flushing2" fully glazed trapway, bringing a super-quiet and powerful flush-No clogs, No leaks. Highly efficient dual-flush 1.6 GPF /1.1GPFElongated and comfort SeatThe extended bowl design provides extra space for a more comfortable experience during longer use.UF Heavy Duty Soft Close SeatSoft close seat,quietly and slowly without slamming.The seat made of advanced technology material that is harder, heavier and stiffer.Quick-Release HingesEasy to install, remove and maintain from the top of the toilet bowl.