Review on Mxnelar 16.4 Ft Ultrasonic Anti Barking Device - Beep, Flashlight, 3 Frequencies - USB Rechargeable Training and Deterrent for Indoor/Outdoor Dogs by Michelle Meyer

Very compact so it's easy to take outside when walking the dog. She is from the Great Pirnees so she barks a lot. Especially with cars and people walking down the street. I knew I liked it the day I got it, but wanted to see how it goes with the workout. I am happy to say that 10 days after owning this product my dog either does not respond to cars/people or sees me picking up the device and immediately lays down and relaxes. Literally a miracle, the best dream in recent years!