The Step-down Transformer allows for you to plug directly into an indoor 240v mains power point up to 100m from the gate opener control box at the gate. You then can run low voltage wire between the 2 saving cost with the alternative means of running mains power to the gate. You should use at least 2.5mm wire to allow for voltage drop over long distances of more the 50m.
Input voltage: 240vac
Please tell us what voltage you need and we will see if we can help.
Note: Transformer maybe a different style to the one in the photo depending on stock brand at time of sale.