V50 - Mirror Defogger 600 600 mm Square (. V55 -Mirror Defogger 400 600 mm Rectangular (. V51 -Mirror Defogger 400 400 mm Square (. V53 -Mirror Defogger 300 300 mm Square (. Easily can be connected to the bathroom light then can be switched on and off with bathroom light switches or separate switch can be installed. ).