Check the listing for details. Dog Training Collar with 7 Training Modes, 4200Ft Remote. Condition: Used. Listed at 23.99 USD. We have this shock collar in used condition, but it works excellent. You can more details on the pic’s. Dog shock collar come with a size adjustable collar strap, length from 8 to 26 inches, fits dogs from 8 to 140 lbs.but only those weighing over 20 pounds or age over 3 months can use the shock training function. Thank you for looking!!!!