When to use tone, vibration, or stimulation on an e collar? PG 302 Vibrating Dog Collar Pager E Collar Technologies These shock collars might not be what you think. The Ecollars we use in training are blunt stimulation, similar to that of a tens unit that you would use at a physical Amazon.com: Bundle of 2 Items E Collar PG 300 1 2 Mile Remote Waterproof Trainer Educator Vibration and Sound Stimulation Collar only with PetsTEK Dog Training Clicker and Dog Whistle Training Kit : Pet Supplies