CLEAN BREATHING: Deep Cleaning (Optional), Biological sterilization filter, Catechin filter, Silver ion filter, IDU Self-cleaning. Efficient 4-step self-cleaning for healthier, pure air. WHOLE HOUSE PURIFICATION (Optional). Safe and Reliable Golden Fin technology. METICULOUS CARE: WiFi/Bluetooth efficient networking, 7 Fan Speeds to suit various needs, Sleep Mode, Fast Cooling, Easy Installation and Maintenance. Warranty: 12 years on compressor, 5 years on parts, and 2 years service warranty by Gree. Keep the warranty card for claims. For support, call Gree at 16649.