The Educator Bark Control Collar is an American brand of bark collars made by E-Collar Technologies Inc. This American company is usually known for their high quality Remote Dog Collars. We have 2 models available, the BL-100 and the BL-100 XS. The XS stands for Extra Sensitive which is designed to be used on soft barkers and whiners. Both models are proven to be effective, on medium to extra-large sized dogs that loves to over communicate.