Aetertek AT-219 New Version 600 Yard Remote Control Dog Training Collar Shock Vibration Auto Anti-bark for 2 Large Dog 100% waterproof and submersible design, 1 year warranty. Intelligent 18 levels of progressive shock corrections(both in shock time and voltage) to correct bad behaviors effectively. Big LCD display, Latest individual design ,novel in appearance. Rechargeable transmitter and receiver,save on buying replace battery Can be used manually as a remote dog trainer or as an automatic anti-bark/bark control collar