This is great call. If you use it in a manner consistent with the directions, you will be able to produce the sounds needed to call either fox or grey squirrels. You do not need to slam or hit the bellows to cause the call to emit these sounds. The key to making the call work is knowledge of the squirrel, without it the call will not be of any help. With knowledge of your prey, this call will help you fill your game bag. All in all, a great sounding call which is well made, durable, and worth the price. I would suggest it to anyone.