Complies with 802.11ac standards, backward compatible with 802.11b/a/g/n; 128-bit WEP, 64-bit WEP, WPA, WPA2, WPA-PSK and WPA2-PSK data encryption

5-Stage Purification. The TPP640S, when on Auto Mode, will display the air quality & automatically adjust the purification level. The light on the front of the unit will change between blue, orange and red depending on the quality of the air as it adjusts the fan speed accordingly.