Elite-Tek ET-9898 Remote 4-in-1 Training Collar with Shock,Viabration,Ultrasound, and Auto Anti-bark for 1 Dog Collar features shock, vibrate and ultrasonic sound. Stimulation has 10 different intensity levels of shock, vibrate and ultrasonic sound. Collar can be set to automatic anti-bark mode and the remote can still be use for correction Rechargeable heavy-duty 100% waterproof receiver with up to 550 meter range Highest shock can work for large dogs and extra stubborn dogs.