Best Anti-Barking Device bark deterrent unit uses a 9-volt alkaline battery that can last for as long as 6 months depending on how often your dog barks. This is a safe and harmless bark control device that can be used on dogs of any size or breed. It comes with a strong microphone that can detect your dog’s barking and avoid false corrections. If you’re looking for an affordable, versatile, and safe bark deterrent device, the PetSafe Indoor bark control system is your best option. Our most budget-conscious ultrasonic dog anti-bark gadget is definitely the Zelers Upgrade Rechargeable Mini Bark Control Device. This is a solid bark control unit designed in a black box shape but with a host of features and functions to prevent your dog from barking unnecessarily. The Rechargeable Zelers Mini Bark Control is designed for both indoor and outdoor uses. It comes with 4 range levels to choose from and can even detect a dog barking 50 feet away. This can be used on dogs of any size although the manufacturer insists on using it on dogs aged 6 months and above. It’s run by a rechargeable battery that can run for a whole month from a single charge. The unit has a low power indicator that shows you when to replace the battery. It’s an easy-to-use ultrasonic anti-bark control unit that can easily be hung on a wall, fence post, or tree. Click here to get it: