Electric portable water purifier with a 5-stage filter system. - Model: GS-2801 - Number of filter stages: 5 - Electric: Yes - Instruction manual: English and Japanese - Color: Black Thank you for looking. I only stored it while charging it once every few months, and I have never actually used it for filtering, but the LED light now turns on when I press the power button (it worked properly when I first bought it). This is for someone who can repair it and use it, or who wants to use it for filter or parts replacement.