Garmin Delta e-Collar Review In this review of the Garmin Delta, we will discuss the features of this e-Collar which is Garmin’s first Tri-Tronics based training collar. The Garmin Delta provides a range of up to half a mile and 18 levels of momentary and continuous stimulation with both the tone and vibration option. The unit can be expanded to control 3 dogs at a time. The buttons present on … [Read more...]