Train your furry pal with help from the SportDOG Brand Contain + Train Add-A-Dog System. This system allows you to secure up to 3 dogs within a set boundary and remotely train pets indoors and outdoors. The collar features Anti-Linger technology to help save battery life and comes with containment and training modes. The waterproof construction is submersible in up to 10 feet of water and can fit most dogs 10 pounds and up.