GCZ air purifier is designed to provide high-quality air with advanced technology and superior performance, creating a healthy space for you and your family.  AP402 is a truly smart WiFi air purifier, you can use the APP by matching 2.4 GHz WiFi to control it wherever you are. This WiFi air purifier is also voice-controlled, you can operate your purifier with Alexa or Google Assistant. GCZ air purifiers are equipped with a powerful H13 HEPA filter, 4-stage filtration process, and can effectively capture particles 99.97% of hair, fur, dust, smoke, mold, pet odor, allergens, odor, cooking fumes as small as 0.3 microns. Find official replacement filters on Walmart, please click here!