For electronic hair remover sticks, CE, RoHS, and FCC certifications are essential for the EU and US markets to ensure electromagnetic compatibility and hazardous substance restriction. If the product is intended for facial use, look for FDA registration or ISO 10993 (Biological evaluation of medical devices) compliance to guarantee skin safety. For manual sticky rollers, ensure the materials meet REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals) standards to avoid toxic adhesives.