As advertised by Amazon 1.6 Watts @ 12VDC good to 512MHz.
Believe what you read from purchaser comments! Too bad I read the comment from WA5BDU after it was in my hands!
(With a name like Nick Kennedy (WA5BDU) he might be Irish and a well-known ham homebrewer. He has published a very understandable piece on homebrewing Crystal Filters.)
I will not denigrate the above amp by calling it a piece of Crap, but I had terrible experience with trying to make it work. More than 6VDC and it oscillates and the most I got out of it was about 500milliwatts on 20M. The $18 price was like a siren's song that resulted in a shipwreck!
With no time to scratch build things I have been making small purchases from Amazon of built boards in hopes of fabricating rigs using purchased modules. So, learn from my sad experience -- avoid purchasing this unit.
If it seems almost too good to be true, 100% of the time it isn't true.
73's
Pete N6QW