Aetertek AT-219 (UPGRADED NEW VERSION) LCD Display Remote Control 4-in-1 Dog Training Collar with Shock,Vibration,Beep Tone, and Auto Anti-bark for Small, Medium and Large Dogs Rechargeable Remote with remote range up to 600 yards (approx. 550 meters); Rechargeable receivers are 100% waterproof. 18 levels of Shock to choose Auto anti-bark when dogs left alone Vibrate, beep or shock each dog and both dogs to meet different training purposes.