Dogtra YS300 Bark Collar - Dogs are our best friends. But our dearest friends can cause problems too, like unwanted barking. The Dogtra YS300 No Bark Collar is a safe alternative to stop unwanted barking. The YS300 is bark sound activated and is made for dogs 10 pounds or larger. The sound recognition sensor uses a microprocessor to distinguish between the dog's bark and the surrounding ambient noise. The YS300 is the smallest rechargeable No Bark Collar from Dogtra and is packaged in an ultra-compact form. The Dogtra YS300 uses a patented non-stimulating Pager Vibration warning and low-mid stimulation in 1-6 levels. The Dogtra YS300 is fully waterproof, and comes with 5/8in Surgical Stainless Steel Contact Points, a 2-hour rapid charge battery and charger, antimicrobial collar strap, and a 1-year warranty. Features: 6 Stimulation Levels 2-Hour Rapid Charge Batteries Non-Stimulating Pager Vibration Low to Medium Power Stimulation Fully Waterproof Receiver Bark Recognition Sensor For Dogs as Small as 10 lbs. 1-Year Warranty In the Box: "No Bark" Collar Battery Charger Owner's Manual Plastic Dummy Contact Points