| Product Description- Human sensor : Automatically detects the level of human activity - Fuzzy sensor : Automatically detects the indoor pollution - Filter chang melody : Automatically detects the filter pollution - Timer : 1,2,4 and 8 hours- Negative ion : Generates negative ions, the vitamin of air - Remote control : Multi-function remote control- Oxygen generation(optional) : Designed to generate oxygen with the outdoor unit connected- ABS exterior | 
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