【Smart Sensor Hydration System】3 modes: 1. Motion-Activated (16s flow when approached, cycles every 90min if idle) 2. 15min Interval flow 3. Continuous Flow (charging required). High-sensitivity detection encourages playful hydration. 【20-Day Marathon Battery】A robust 4000mAh battery provides up to 20 days of uninterrupted service on a single charge, ensuring reliable performance even during power outages. 【Multi-Pet Ready 3L/108oz Tank】Designed to keep water fresh for up to 7 days for one adult cat or 5–7 days for multiple cats—meaning fewer refills and more convenience for you. 【4-Stage Purification】Enjoy clean, healthy water with our layered filtration system that combines filter cotton, coconut carbon, ion-exchange resin, and a dense sponge. The filter replacement reminders ensures optimal drinking conditions. 【Library-Quiet 20dB Pump】Operates at an ultra-quiet 20dB—so silent, it’s perfect for night-time use without disturbing your household. 【Vet-Approved Stainless Steel Tray】Features a 9-inch, food-grade 304 stainless steel tray that helps prevent whisker fatigue and chin acne, and is dishwasher-safe for effortless cleaning. 【Auto-Safety Technology】Equipped with a water level monitoring light and dry-run shutdown for added safety, plus a reusable pump foam and replaceable filter. For consistently safe and pure water, always use our original filters—we advice you to replace them every 10-15 days (search ASIN B0DRTV93GX to find the filter). a+