The socket adapter functionally correspond to power strips with leakage up to 13,500 A. In conjunction with simple no-name power strips these can therefore be used as an inexpensive alternative to the power strips with surge protection. Processing works with value and robust. However, the housing could be a little smaller, because it may come to space problems with other big power plugs at adjacent outlets. The efficacy of surge protection is identifiable by a warning light.
Due to the comparatively low purchase price a buy recommendation.