At minimum, require: ISO 23351-1 acoustic performance class (minimum Class A for focus and call zones), CE marking (EU/UK electrical safety), UL certification (North American markets), and an independent third-party quality verification such as SGS or equivalent. Additionally, require EU E1 formaldehyde emission compliance for material safety in enclosed occupied spaces. HIGHKA pods hold all of these certifications — CE, UL, ISO 9001, SGS, and EU E1 — with ISO 23351-1 Class A acoustic certification at 35 dB noise reduction.