Through the stylish LCD display and control panel, precise temperature can be selected with operating information combined at a glance.  By detecting the incoming temperature and flow rate from the water inlet, it can sustain a stable temperature through precise calaulation of energy required.  It can cope with varient flow rate, yet maintaing a comfort showering experience.  The DEL SL series comes with a temperature indication light to ensure safety.  It also fulfill the IP25 hoseproof standard which allows the unit to be installed within the showering area, definitely a combination of safety and reliability.