... design, take no space. Indoor Negative Ionizer with Filter Installation: Plug in the power socket, If the ... and work properly. Features:1. Use advanced ionic air movement technology, remove odor and dust, kill bacteria ... offensive odors. YL-100C, fill up the air with negative ion, catch the positive particles, ... the air such as dust, pollen, fuzz and fungal spores. There is no need to replace filter ...