- Improved cat fountain with external infrared sensor: when an object approaches or moves within range, the water dispenser activates automatically. If no pets are nearby, it remains stationary. The external sensor module (adapter and water dispenser not included) fits all USB interface drinking fountains for cats, dogs, and other pets. For indoor use only. Do not touch the water. - Energy saving and quiet operation: infrared motion sensor provides comfort, safety and practical energy savings. The fountain uses infrared radiation from the pet as a signal to work when the pet is in the detection area. Reduces fountain noise, extends the pump life, and helps awaken the pet's interest in drinking water. - High stability and reliable performance: motion sensor with wide detection range and 180-degree detection angle, approx. 3 meters detection distance. High and stable sensitivity to save energy and improve efficiency. Stop time is programmable: 30 seconds after the animal leaves the detection area, the fountain stops. - Practical and convenient design: attractive and simple flower appearance. The DC 5V USB PIR cat fountain motion sensor uses durable ABS material. Compact and easy to conceal, yet convenient to use. Size: 45 mm x 45 mm x 30 mm. Cable length: 1.8 m USB input, 0.19 m USB output. Accessories include screws and stickers for flexible installation options. Choose the installation method that best fits your setup. - Compatibility and installation notes: fits USB-powered drinking fountains for cats, dogs and other pets when used with the external sensor module (adapter and water dispenser not included). Indoor use only. Do not touch the water. - Use scenarios: - In a home with a USB-powered cat fountain, the sensor activates water flow as the cat approaches, promoting hydration without continuous running. - In a multi-pet household or small office, the 180-degree sensor covers a broad area, ensuring the fountain runs only when a pet is nearby and stops after 30 seconds of no activity. - In compact spaces or discreet setups, the small, flower-like sensor blends with decor while providing reliable, hands-off operation.