Travel surge protector
Why use a surge protector in the first place? Most or all equipmenent you listed have regulated power supplies that will absorb the most common voltage fluctuations. I never bothered about this and nothing has gone wrong this far (in several African, Asian countries, US).
Most power supplies can handle the EU voltage of 230 V, as indicated on the adapter/equipment, perhaps with the exception of items that run on 120/230 V directly (motors, etc) and - apparently your surge protector.