Barely used! Micro Educator ME-300 1/3 Mile Remote Dog Trainer. Bought this when my puppy went to boot camp, it was only used for 2 weeks. It was how the professional dog trainer trained him. The collar has a sound, vibrate, or shock setting. It has remote and finger device. Everything is in working order. The only thing missing is a “tray insert,” but that does not affect the capability of the device. We never had one when we purchased this product new (see note that came in the box). Small & large collar options included.