Kills bacteria, viruses and is 100 percent chemical free, leaving no scent or residue This practical hybrid device is perfect for cleaning an entire room up to 320 cubic feet (6' x 7' room with 8' ceiling) when directly plugged into an outlet Can adjust from 20mg/h of ozone output depending on the size of the room The unique hybrid function of this device also incorporates a 5,000mah rechargeable battery for extreme extended use on the go Makes it convenient for duffle bags, vehicles, camping or anywhere else off the grid Omits 20mg/h of ozone output when in battery mode and will run continuously with a battery life of (8) hours