This AETERTEK® remote control dog training shock collar system has three correction means(Tone Vibration Shock) and auto anti-bark features more easier to use. Can be used as 1 dog or 2 dog remote training shock collar system; Can be used manually as a remote dog trainer or as an automatic anti-bark/bark control collar when dogs left alone; If necessary remote function can also be used while in auto mode; Vibration ultrasound and corrective shock can be used separately; 18 Levels of progressive shock adjusts both in intensity and duration); Strong correctional vibration; Beep tone/ultrasound; Rechargeable WATERPROOF and SUBMERSIBLE receiver shock vibration and beep collar with long and short prongs for all coat types; Range of up to 600 yards (Approx. 550 meters) and signal can pass through obstacles such as walls and fences;