Usb Cable Length: 1.8 meters.
Any USB port with output of 5V, 2A can make it work.
Note: It is normal that the "Front USB Port'' of some desktop computers is not available. Don't worry, please use the "Back USB Port" of the host computer. Laptop USB port can be used normally.
For Best Results Please Read The Instruction Guide:
Place your filter under running cold water until wet.
Place on flat surface & fill tank from a water pitcher.
Point towards you & adjust the grill to direct air flow.
We recommend regular cleaning of your filter. See Product Guide or Care & Cleaning label on filter for instructions.