Long reach — 25 m cable: The cable gives you a full 25-metre extension, which is useful when the power outlet is far from where you want to use appliances or tools (e.g. across rooms, in a garden, at a worksite, or during events).
Multiple sockets: It comes with three 13 A sockets, allowing you to power several devices at once. That adds convenience compared with a simple single-outlet extension cord.
Good cable quality (in many variants): One version uses 2.5 mm2 copper wiring — a heavy-duty specification appropriate for higher loads and better power transmission than thin cables.