This is a like new HeeNzz Ultrasonic Dog Trainer that we bought with the hope that it would stop out two Shetland Sheepdogs from barking. We tried shaking a can with coins and that did not work. We tried the spray bottle with water and that did not work. The blast of air--nope. So we hoped this Ultrasonic Trainer would be the solution. Nope. Shelties are barkers. We've had four and they all bark (it's in their breeding to bark because that is how they herd animals). Anyway, when you have two dogs an ultrasonic training device may not be the right choice because while trying to stop one from barking both hear the high pitched sound and go crazy, and that's a problem especially if only one was the "barker".
So, this really nice, really well-made, used for a week and then put away device is no longer needed. It has several choices for the user: Ultrasonic sound, Beep sound, and Flashlight and Ultrasonic (for use in darker areas. It comes as shown with the original box, original paperwork, and the USB charging cord. We've heard from other dog owners that these devices work. However, they just are not the solution for shelties. We paid almost $40 for this like new training device and are selling it for almost half price. Email or call if you are interested. My included phone number is a landline so no texts.