The KWC ONO touch light PRO is an electronic faucet operation with two electronic controls: a permanently mounted device and a  portable wireless, touch-operated device with magnet base. Users tap the portable device once for the cold temperature, twice for the warm setting or three times for the hot temperature. The colored light ring designates the selected temperature. It also offers two separate water outlets: a swivel spout and a semi-professional spray. The fifth component, the mixer itself, is usually concealed below the countertop.