The Gree Sapphire 9K BTU Mini-Split Indoor Unit is loaded with useful features that give you more control over your home air conditioner than ever before. The unit offers intelligent preheat and defrost programs to help keep you comfortable while saving energy. Combined with the integrated self-diagnostics that make troubleshooting issues a breeze, it will feel like your home has been brought into the modern age. This unit's I-Feel technology senses temperature based on the included remote control rather than the unit itself, allowing it to adjust more accurately to your needs.