these are tritronic callics 70 g3 dong tranning collors, a 6 dog systen,  6 collors wit socking device an 1 transmiter to operate all 6 collors  also a charger for each collor  an a carring case, withextra stinulaer studds thi system new is between 1200.00 to 1300,50      you cant beat it for 900.00 dolly well taken care of   ors its like new an ver

The Tri-Tronics Classic 70 G3 is a full-size, full-range remote training collar. The Classic 70 is the rugged, durable workhorse of the Tri-Tronics line of collars. Simple one button per dog operation has made it the perfect "Problem Solver" for all of your dog training needs. The Tri-Tronics Classic 70 has been one of the most popular Tri-Tronics collars for almost 40 years because of its simple design and ease of use.