TOILET MODEL BB0905 SIZE L.18 X W.8.5,This unit requires NO ELECTRICTY and NO battery,Flow rate control hot and cold water from low to high Water temperature control knobs adjusted from cold to hot. Double nozzle with special one for lady ,Self clean nozzles, Good for any two pieces toilets,All parts included ,easy to install, no special tools requires. Assembly instruction included.Factory warranty for one year of any defect or workmanship.