1. Introduction and Product Overview
The FELIWAY® Optimum 30 Day Cat Calming Plug In Pheromone Diffuser Starter Kit is designed to help reduce common signs of stress in cats and kittens. Utilizing a patented pheromone discovery, this diffuser provides enhanced calming support, making your feline companions feel more secure and relaxed in various situations.
This drug-free and non-sedating solution is the #1 vet recommended brand, backed by over 25 years of feline stress expertise and scientific research. Each 48ml refill provides up to 4 weeks of continuous calming support and covers an area of up to 700 square feet.

Image: FELIWAY® Optimum Diffuser Starter Kit, showing the diffuser unit and refill bottle alongside its packaging.
2. Key Benefits
FELIWAY® Optimum offers significant benefits for cats experiencing stress:
- Reduces Common Signs of Stress: Effectively addresses issues such as urine spraying, scratching, fears, tension, and conflicts.
- Enhanced Serenity: The patented pheromone formula provides improved calming results, helping cats in more situations than previous formulations.
- Widely Trusted: Used by millions of cat families globally to alleviate stress-related behaviors.
- Safe and Drug-Free: Non-sedating and safe for cats, with no effect on humans or other pets.
- Broad Coverage: Each diffuser unit covers up to 700 square feet, suitable for large living areas.

Image: Visual representation of common cat stress signs addressed by FELIWAY® Optimum.

Image: Data illustrating the significant reduction in stress behaviors observed with FELIWAY® Optimum.
3. Setup Instructions
- Unpack: Carefully remove the diffuser unit and refill vial from the packaging.
- Assemble: Screw the refill vial into the diffuser unit until it is securely fastened. Do not overtighten.
- Placement: Plug the assembled diffuser into a standard electrical outlet in the room where your cat spends the most time. Ensure the vents on the diffuser are pointed upward.
- Clearance: Allow at least 4 feet of clear space above the diffuser for optimal diffusion. Avoid plugging it under shelves, behind curtains, or near doors, as this can affect its efficacy.
- Activation: A green light on the diffuser indicates it is powered on and functioning correctly.

Image: The FELIWAY® Optimum diffuser unit, ready for assembly.

Image: Proper installation of the diffuser in a wall outlet.
4. Operating Instructions
The FELIWAY® Optimum diffuser is designed for continuous operation to provide consistent calming support:
- Continuous Use: For maximum calming results, keep the FELIWAY® diffuser plugged in 24/7.
- Coverage: Each diffuser effectively covers an area up to 700 square feet. For larger rooms or multi-cat households, consider using additional diffusers.
- Optimal Location: Place the diffuser in the room where your cat spends the most time. Avoid areas near litter boxes or in hallways, as these are typically not primary resting areas for cats.
- Pheromone Release: The diffuser continuously releases calming pheromones into the air, which are undetectable by humans but provide a sense of security and well-being for cats.
5. Maintenance
Regular maintenance ensures the continued effectiveness and safety of your FELIWAY® Optimum diffuser:
- Refill Replacement: Replace the 48ml refill vial once a month (approximately every 30 days) to ensure continuous pheromone release.
- Diffuser Unit Replacement: The diffuser unit itself should be replaced every 6 months (twice a year) to maintain optimal performance and safety.
- Cleaning: Periodically check the diffuser unit for any dust accumulation and gently wipe it clean with a dry cloth. Ensure the unit is unplugged before cleaning.
- Storage: Store contents and containers in a well-ventilated area, away from direct sunlight or extreme temperatures.
6. Troubleshooting
If you observe that the FELIWAY® Optimum diffuser is not providing the expected calming effects, consider the following:
- Check Placement: Ensure the diffuser is not obstructed by furniture, curtains, or placed in a drafty area, as this can hinder proper diffusion. It should be in an open outlet with vents facing upwards.
- Room Size: Verify that the room size does not exceed the recommended 700 square feet coverage area. For larger spaces, additional diffusers may be necessary.
- Refill Level: Check the liquid level in the refill vial. If it's empty or nearly empty, replace it with a new FELIWAY® Optimum refill.
- Diffuser Unit Age: If the diffuser unit is older than 6 months, it may be less effective. Replace the unit as recommended.
- Product Compatibility: Ensure you are using genuine FELIWAY® Optimum refills with a FELIWAY® Optimum diffuser. Mixing brands is not recommended and can affect performance.
- Consult a Veterinarian: If behavioral issues persist despite proper use, consult your veterinarian to rule out any underlying medical conditions.
7. Specifications
| Brand | FELIWAY |
| Model Name | Feliway Optimum |
| Item Model Number | D92110K |
| Color | Translucent |
| Scent | Unscented |
| Material | Plastic |
| Power Source | Corded Electric |
| Capacity | 48 Milliliters (1.62 Fluid Ounces) |
| Floor Area Coverage | Up to 700 Square Feet |
| Runtime (per vial) | Up to 30 days |
| Wattage | 1 watts |
| Special Feature | Silent Operation, Pet Friendly |
| Item Weight | 4.8 ounces |
| UPC | 850002593105 |
| Country of Origin | France |
8. Safety Information
Please read and adhere to the following safety guidelines:
- Keep Out of Reach: Always keep the diffuser and refill vials out of reach of children and pets.
- Ingestion Warning: HARMFUL OR FATAL IF SWALLOWED. If ingested, call a physician immediately. DO NOT induce vomiting. Contains petroleum distillates (i.e. Isoparaffinic Hydrocarbon).
- Ventilation: Store the product in a well-ventilated area.
- Disposal: Dispose of contents and container in accordance with local regulations.
- Product Compatibility: Use only FELIWAY® Optimum refills with a FELIWAY® Optimum diffuser. Do not use other brands' refills or diffusers together.
- Electrical Safety: Each FELIWAY® Diffuser is designed with a plug adapted to local electrical systems. Do not use this diffuser in a country with a different voltage or with an adapter, as this may pose serious security concerns. Ensure the diffuser has the correct plug for your country before plugging it in.
9. Warranty and Support
For detailed warranty information and customer support, please refer to the official user manual or contact FELIWAY customer service.
You can access the full User Manual in PDF format here: FELIWAY Optimum User Manual (PDF)
For further assistance or inquiries, please visit the official FELIWAY website or contact their dedicated support team.