[Dog Training Collar for 2 Dogs] The E collar designed with 3 efficient modes: Beep, Vibration and Shock, allowing you to adjust the stimulation level based on dog's temperament. Perfect for helping correct dog barking or other bad behaviors in a humane and safe way! | [4 Channel with Up to 1600FT Range] The shock collar with remote supports 4 channel and has memory function for settings, easy to train 4 dogs simultaneously without resetting it. 1600ft remote range enables you to enjoy the training time in the backyard, park, or anywhere else! | [No Accidental Shock, Safety First] Security keypad lock significantly prevents any accidental pushes while carrying the remote. Come with 2 pair of conductive silicone prongs, it enable to protect your dog's fur and skin from injury. | [Waterproof Receiver Fits All Sizes Dogs] The receiver is IPX7 waterproof, no worries while your dogs enjoy swimming, showering, and playing in the rain. The pet training collar strap can be adjusted, comfortably fitting dogs over 10 lb and up with neck sizes 8-25 inches! | [Quick Charging & Long Lasting Battery] Both receiver and remote can be fully recharged within 2 hours by phone adapter and USB outlet of the PC/power bank/car. The remote can last up to 45 days of standby time and electric dog collar 35 days.