d1c7762c_anding___Domex_Appliance_Store__Energy_Rating
Lets you know when to refill the dishwasher with rinse aid [Energy Rating] 
Rinse Aid Indicator
Buy Dishwashers in London - Whirlpool ADP451WH Dishwasher Slimline (45cm) Freestanding - Domex Appliance Store
Energy Rating