What Happened to Tri-Tronics ?
Tri-Tronics was the original e-collar company dating back to 1968. The original training collars manufactured back then were large, cumbersome and often were not adjustable as far as output of the collar.
In 2011 Electronics manufacturer Garmin acquired Tri-Tronics, which heralded new models and features. The Garmin Delta Sport combined a remote training collar and a Bark Limiter to help control barking. Since 2011 Garmin have launched the Garmin Pro 70, The Garmin Pro550, The Garmin Sport Pro and many other Dog related tracking and training collars.
The Tri-Tronics brand is still visible on some Garmin tracking & training products