DOGTRA - YS300 No Bark CollarDogs 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 dogs bark and the surrounding ambient noise. The YS300 is the smallest rechargeable No Bark Collar from Dogtra and is