Voltage: Ireland uses 230V/50Hz electrical system, same as UK and most of Europe.
Plug Type: Type G (UK-style three rectangular prongs). This is different from continental European two-pin plugs.
Adapters Needed: Visitors from North America, Asia, Australia, and most other regions need adapters. Continental Europeans also need UK-style adapter despite being in Europe.
Most modern electronics (phones, laptops, camera chargers) have built-in voltage converters (100-240V) and only need plug adapters. Check device specifications before travel.
High-wattage items (hair dryers, curling irons, electric shavers) may need voltage converters if not dual-voltage. Consider buying cheap hair dryer in Dublin rather than bringing converter.
USB charging increasingly available: many hotel rooms have USB ports, cafés offer charging points, buses equipped with USB sockets. Bring USB cables for convenient charging without adapters.