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This compact waterless cold-air diffuser is rechargeable, uses USB-C charging, and offers three adjustable diffusion modes. It suits cars, desks, and small rooms for people who want portable, concentrated fragrance without water or added humidity.

The Tower Pro is a corded, waterless cold-air diffuser designed for large spaces. It offers six diffusion modes, Smart Life app scheduling, an IR remote, on-device controls, and three warm-glow light modes, making it suitable for living rooms, suites, bedrooms, and other larger areas.

This freestanding waterless cold-air diffuser is designed for large spaces and includes remote and on-device controls, six diffusion modes, and an ambient night light. It suits people who want strong fragrance coverage without water, heat, or app setup.

This cordless waterless cold-air diffuser uses compatible fragrance oil, USB-C charging, three diffusion modes, and a cyclable 7-color light. It suits small to medium rooms where flexible placement and ambient lighting are more important than app control.

Aromar Grove Ultrasonic Diffuser uses ultrasonic technology to produce a cool mist for aromatherapy, with multi-color LED lights (7 colors). It supports continuous mist and interval timer settings, and it includes safety auto-shutoff when the water runs out. It suits home use where you want quiet, flame-free fragrance diffusion.