Dummy collars look and weigh the same as a normal electric collar. The proper way to use and train with an e-collar is to condition the dog to wearing it before stimulation is used. The goal being that the simple act of putting the collar on does not mean anything to the dog. This is done during a two-week period where the handler puts the collar on and takes it off a couple of times a day. It is rotated with the prong collar, the e-collar and the normal leather collar. It is critical to good training that the dog does not recognize the collar going on as training and then only mind when its on.
SMALL
175NCP, 180NCP, 200NCP Series, 210NCP Series, 280NCP Series, 300 Series, 7000 Series, EF-3000, EF-3000 Gold
MEDIUM
500 Series, 1100NC, 2300 Series, 2500T&B Series, 3500 Series 1000NC, 1000NP, 1200 Series, 1800 Series, 1900 Series, 2000 Series, 2200 Series, 7100 Series