Hydrogen Concentration:Produce high hydrogen content> 800ppb
Charging Time: 2.5 hours
Working Time:1.5 hours
the lumi works great. my issue is that the instructions tell you to use hydrogen toner, which cannot be found, or mineral or tap water. instructions say no distilled or purified water.
I also purchased the hydrogen rich water cup & the instructions for that recommend using purified or distilled water - just the opposite of the lumi. I am not sure why the 2 devices differ on water use