It is Slooo-oooow.
This charges the phone with fast charge.
I should note that I don't have a fast charger wall wart, and don't need one, since my phone charges quick enough with just a regular adapter or off the USB port on my PC.The charger displays blue at all times when plugged in, and green when the phone is charging.
This works great I put my galaxy in its case on the stand and it charges great...I bought I recommend.
Now you could tell your phone back on and work as long is it's on the base the minute you take it off it it says it takes an insane amount of time to charge!
Other than that I cannot get this to charge my phone with my protective case on it.
Well it's only been about six months and two out of three are in the garbage.
I purchased three of these ($36 each) in 2016 and this is the second to go bad in months 19 to 30.
As always I put my phone (Galaxy S8) on this wireless charger for a night but in the morning I was noted that my phone was completely dead and it was because the charger wasn't working.