The Vicks Dampfinhalator VH200E is designed for European voltage (typically 220-240V). It is not directly compatible with a 120V power source, unless specified otherwise by the manufacturer.

I'm not completely certain about this answer. The information I have does not fully address whether this specific model is compatible with a 120V power source. However, many Vicks steam inhalers are designed to work with 120V outlets, but some models may have dual voltage capabilities for international use. For precise compatibility, it would be best to consult the manufacturer's official documentation or contact their customer service.