Hearkat, you’re in Philly, right?
When I was still living there, I couldn’t get it to work right either and it was the one by Griffin, pretty expensive.
What frosts me is that the store from which I bought it is right smack dab in the center of town (Walnut St.) and you’d think they could drop me a frickin clue. Obviously they would have known this.
Anyhow, my advice to the OP would be to proceed with extreme caution and make certain that the place from which you purchase one, allows returns without penalizing you with charging a “re stocking fee”. grumble, grumble, grumble…