| 1 | Passive Scent-Inhalation Pen | Ambient air is drawn through a scented insert or aromatic material when the user inhales through the mouthpiece. No liquid is heated or aerosolized. | Light, localized aroma with a relatively low intensity. | None | Replaceable scent insert or cartridge. | Simple construction, low operating cost, and no battery transport requirements. Flavor longevity depends on the volatility of the aroma material. |
| 2 | Replaceable Aroma-Cartridge Pen | A removable cartridge containing a scented wick, bead, or pad is positioned in the airflow path. Air passes over the material during inhalation. | More consistent than an open scent pad because the cartridge controls exposure to air. | None | Replaceable cartridge; reusable outer shell. | Buyers should check cartridge compatibility, sealing quality, material safety, and packaging requirements for international shipping. |
| 3 | Refillable Essential-Oil Aroma Pen | A small absorbent wick or reservoir holds a limited amount of diluted aromatic oil. Inhaled air passes over the wick without direct heating. | Distinct botanical or fragrance notes, usually stronger than a dry insert. | None | Refillable wick or reservoir, depending on the design. | Oil compatibility, leakage prevention, allergen labeling, and avoidance of direct ingestion are important for product documentation. |
| 4 | Venturi Air-Mixing Pen | Fast-moving inhaled air creates a pressure difference that draws aroma from a small chamber and mixes it with the airflow. | Noticeable aroma that varies with inhalation speed. | None | Reusable body with a replaceable aroma chamber. | Performance depends on airflow resistance, chamber geometry, and the consistency of the scent medium. |
| 5 | Vapor-Free Hydration-Flavored Air Pen | The device delivers scented air only; it does not intentionally produce water vapor, smoke, or heated aerosol. Flavor perception comes mainly from aroma compounds. | Perceived flavor is primarily retronasal aroma rather than a liquid taste. | None | Usually disposable or fitted with a replaceable scent element. | Marketing should clearly distinguish aroma delivery from hydration, nicotine delivery, and vapor production. |
| 6 | Battery-Powered Aroma-Fan Pen | A small fan moves air across a scented pad or cartridge when an airflow sensor or button activates the device. | More controlled output than passive designs, with relatively stable airflow. | Rechargeable or replaceable battery | Rechargeable body with replaceable scent media. | Battery capacity, charging connector, electrical safety testing, noise level, and air-path cleanliness matter for global buyers. |
| 7 | Airflow-Activated Aroma Pen | An airflow sensor detects inhalation and activates a small fan or valve that exposes the aroma chamber to moving air. | Flavor is released only during use, helping reduce passive scent loss. | Usually rechargeable | Rechargeable device with replaceable or sealed aroma module. | Sensor reliability, activation threshold, battery protection, and resistance to accidental activation should be evaluated. |
| 8 | Multi-Flavor Selector Pen | Two or more separate aroma chambers are connected to a mechanical selector or airflow switch, allowing the user to choose one chamber at a time. | Multiple flavor options with reduced cross-mixing when chambers are properly isolated. | Usually none | Replaceable chambers or replaceable scent inserts. | Selector durability, chamber separation, cleaning access, and clear flavor identification are key purchasing factors. |
| 9 | Timed-Pulse Aroma Pen | A small electronic controller releases aroma through brief fan or valve pulses rather than continuous airflow. | Intermittent aroma designed to limit material consumption and maintain a predictable dose of scent exposure. | Rechargeable or replaceable battery | Rechargeable body with replaceable aroma module. | Timer accuracy, battery runtime, control simplicity, and compliance with electronic-product shipping rules should be reviewed. |
| 10 | Disposable Pre-Filled Flavored Air Pen | The outer shell, airflow channel, and pre-filled scented element are supplied as one sealed unit. The user inhales through the mouthpiece until the aroma fades. | Convenient, ready-to-use aroma with a fixed flavor and service life. | None or sealed battery | Normally replaced rather than refilled. | Packaging waste, shelf life, leakage prevention, labeling, recycling requirements, and destination-market regulations should be assessed. |