Therein lies the risk of the "inexpensive" detectors. Many a person has purchased a Radio Shack detector, only to put it in the closet and give up on the hobby because they couldn't find anything. The old adage "You pay for what you get" applies here.
A better approach is to purchase a used name brand detector from the 80's. In my case I bought a used White's 5900 Di blue box detector for (at the time) about $100.00. If I found I didn't like it, I could easily resell it for what I had invested. Fortunately, I loved it and progressed up to the newer, more expensive units.
Check Craigslist or Ebay for a 5900 Di Pro SL in good shape and then give it a go. You will find far more and enjoy the hobby much more with a "real" detector. And if you should decide it's not for you, believe me, you can easily get your investment back.