Features: 1) Visible style: exposed style which is easy to install and fix 2) Intelligent: according to the frequency of use, self-choose one time flush or two-time function, according to detecting time, self-control flow rate 3) Trap seal protection: automatically flush if no use over 24hrs to avoid odor returning once the trap dries 4) Low power consumption: 1pc 9V alkaline battery can be used for 2 years at 100 cycles a day 5) Dimension: dia.48 x 135 x 85mm 6) Detection zone: 10 - 55cm 7) Water pressure: 0.03 - 0.7MPa 8) Dia. of inlet pipe: G 1/2"