Cup Brass Crompton is designed and manufactured by making use of premium grade of raw materials and is safe to use. If you're having trouble, add each device separately by turning each one on one at a time. This can only be used to operate Crompton smart lights and appliances. Cup Brass Crompton beautiful and luxurious electroplated finish. High air thrust & delivery 100% copper motor with the electrophoretic lacquered surface. This is very effective as well as economical and safe to use.