Your new smart meter will replace the one you have now where you currently get your meter readings from.
The Smart Energy Display (SED) is an energy monitor which wirelessly talks to your new smart meter to show you how much energy you're using.
Whilst the smart meter and Smart Energy Display don't directly reduce your bill, they give you more information so you can reduce your energy use. You can even set daily budgets — in pounds and pence — so you can see when you're close to your daily budget.
You'll receive a Smart Energy Display (SED) when your smart meter is installed.