Take Control Without Compromise – The BP-504 Barkless Pro Anti-Bark Collar Introducing the BP-504 Barkless Pro—the only anti-bark collar I trust for serious dog owners who want results without shutting down their dog’s spirit. Built with our Advanced Bark Suppression Technology (ABST), this collar is smart enough to distinguish between nuisance barking and legitimate protection barking. That means your dog stays sharp and alert—but quiet when needed. You’re in full control with 3 sensitivity levels and 9 customizable stimulation levels, so you can fine-tune it to your dog’s drive and temperament. Want to let the system do the work? Flip on Automatic Mode. Prefer a heads-up before correction? Use the optional warning tone. Powered by a rechargeable lithium-polymer battery, you’ll get days of performance on a single charge—and when it’s time to juice up, the 2-hour quick charge gets you right back in the game. ✅ ABST Technology: Smart correction that allows protective barking✅ Custom Control: 3 Sensitivity + 9 Stimulation Levels✅ Rechargeable: Lithium-Polymer Battery, 2-Hour Fast Charge✅ Built for the Field: Assembled in the USA✅ Backed by a Full 1-Year Warranty Train smarter. Correct precisely. Respect the dog. That’s the American Standard. The use of electronic collars (e-collars) has been banned or restricted in several countries and regions due to animal welfare concerns. These include Wales, Norway, Sweden, Switzerland, Austria, Denmark, the Netherlands, Slovenia, Germany and Quebec, Canada. Please check your local laws and regulations before purchasing or using an e-collar.