When sourcing smart vanities, prioritize IP44 or higher waterproof ratings for all electrical components. Key features should include anti-fog heated mirrors, LED lighting with adjustable color temperatures (3000K-6000K), and integrated Bluetooth speakers. Ensure the cabinet material is solid wood or multi-layer waterproof plywood rather than standard MDF to prevent swelling in high-humidity environments. For the countertop, sintered stone or seamless ceramic is preferred for scratch resistance and ease of cleaning.