Thanks for all replies. I'm relieved that mine is normal. I thought it was going to be totally smooth turning (little bit slow due to drag) not like clicky.

I have not ridden with it yet but just installed on the fork and turned the wheel. I could feel minor vibration through the bike frame with a high speed turning. I will try to ride with it once I put on a tire and a tube.

Just another newbie question, the drag will be same whether I turn on a dynamo light or not, correct? My dynamo light has a switch so just wondering if it would make any difference whether turning on or off.

My ultimate goal would be install dynamo USB charger to charge USB power bank to turn on lights and cell phones, etc.