What is the difference between the RLC-1040 and RLC-1080 line conditioner models?
The RLC1080 has all of the features of the RLC-1040, but also comes with a back-up power supply in the form of an internal battery. Further, up to two additional batteries can be connected to the RLC-1080, which will allow uninterrupted enjoyment of your electronics for some time during a black out.