Dogtra 280C EcollarDogtra 280C The Dogtra 280C e collar is the smallest, most compact receiver and collar on the market. The smaller design is optimal for smaller, mild mannered dogs ten pounds and up. The 280C is a low to medium stimulation system and offers all of the essential tools you need for basic command and field training your smaller dog. The 1 127 stimulation level gives you the ability to easily find the perfect setting for your dogs disposition and training