Amazon.com: E Collar ET 300 Mini Educator Remote Dog Training Collar 1 2 Mile Waterproof, Premium Finger Clicker Trainer, 100 Stimulation Levels + Vibration + Light + Sound 1 Dog Small to Medium, Yellow : Pet Supplies PG 300 Pager Only 1 Dog System E Collar Technologies PG 300 Page Only Vibration Remote Trainer DogSport Gear 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: Educator PG 300 Dog Training Pager OnlyVibration & Tone, 1 2 Mile Range, 100 Adjustable Levels, Waterproof Biothane Collar Included, Rechargeable, Night Tracking Light, Small & Medium Dogs,1 Dog,Red : Pet Supplies Amazon.com: Educator ME 300 Micro E Collar for Dog Training with Remote 1 3 Mile Range, Waterproof, 100 Blunt Stimulation Levels, Tone or Vibration Mode, Night Tracking Light for Small, Medium & Large