Garmin Delta SE Dog Training Collar (010-02608-10)The Garmin Delta SE Dog Training Collar (010 02608 10): Garmin Delta SE additional training collar, for adding a second third dog to an existing Delta SE training system. Key Features Genuine Garmin: Authentic Garmin product with full manufacturer warranty Add on collar for existing Delta SE handheld REQUIRES existing Delta SE handheld (not included) Stim, vibration, tone capability Train multiple dogs from one handheld $99. 99, much less than buying