if you're in Europe, only buy CE certified products.
Two things to remember here:
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there is also the counterfeit CE ("China Export") marking on some cheap products. So some noname super cheap brands are not necessarily actually CE marked despite having a "CE" label.
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CE marking is a just self a certification. It's basically the manufacturer pinky promising that they've totally built something according to CE specs. Only trust it from a reputable brand, because there's a shit load of wiggle room within CE specs.