There are 3 model types.
Model# : CH2001 (normal type and low price without seat cover)
water pressure control , one nozzle type, nozzle is designed to be exposed only when used , cold water only , easy operation, easy installation, no electric bills.
Model# : CH2002 ( functional type for woman without seat cover)
water pressure control , two nozzles type, more hygienic than one nozzle type
(posterior wash , feminine wash ), nozzle is desinged to be exposed only when used, cold water only, easy operation , easy installation , no electric bills,
Model# :CH2003 ( advanced type for helath with seat cover)
water pressure control, available to used three levers (water pressure adjustment, feminine wash adjustment, water temperature adjustment) conveniently, two nozzles type(posterior wash , feminine wash)
nozzle is designed to be exposed only when used , hot and cold water , easy operation , easy installation, no electric bills