App & Voice Control: Connect your smart air purifier to App for features such as power on/off, custom/sleep mode, timer, fan speed, and filter change reminders. Use with Alexa and IFTTT. NotePlease power up your Smart Air Purifier in advance. 5GHz Wi-Fi network not supported. Effective Purification: This air purifier features a dual-channel 360° air intake design, certified by Energy Star, ETL, FCC, and CA65. It can purify a 376 sqft room once per hour. Compared to other air purifiers, it is smaller in size but equally as powerful. Preset Custom Mode: You can pre-set 3 different switch times for the fan speed based on your preferences and create custom combinations. It will run at the corresponding fan speed level during the designated times to meet your customized purification needs. Quiet Operation: This portable air purifier operates with a noise level as low as 24dB in sleep mode.