It can be portable when connected with a micro 5 pin external battery.
Yes, it does produce ion in sleep mode.
It's the sound of ionization. That 's quite normal.
It may seem unstable when a proper port is not connected.
Try different ports for better connection.
Because this product ionizes, electric static may occur.
It doesn't produce a lot of noise, so it is possible to use during sleep.
It produces 0.02ppm. It's less than standard ozone allowance of 0.06ppm.
It is recommended to use a bigger Air Purifier for the living room.
The Zunion Air Purifier covers a large area of 25 square meters.
Every 6 months would be ideal.
It is better not to use filter too long because it collect dust on daily basis.
For everyone who is pledging for the Zunion, will get the exclusive Kickstarter models: IA250 and 350W (instead of the IA200 and 300W)
IA-250 NO Wireless charging: White; Rose Gold; Dark Gray; Deep Blue; Pearl Ivory;
IA-350W Wireless charging: Silver; Dark Gray; Rose Gold; Pusia Pin; Deep Blue; Pearl Ivory;
Don't see the answer to your question? Ask the project creator directly.