4in1 Dog Shock Collar for 2 Dogs, 3300Ft Dog Shocker for Large Medium Small Dogs, Fast Charging E Collar for Dogs, Waterproof Dog Training Collar with Remote 2 Pack with Beep, Vibration, Humane Shock 4-IN-1 SAFE TRAINING MODES FOR 2 DOGS, 3X TRAINING EFFICIENCY Uvzsda dog shock collar with remote 2 pack has the 4 most scientific and effective training modes after millions of tests by professional dog trainers: ①Beep, ②Vibration(1-8 levels), ③Shock(0-18 levels) ④Memory Function, so it's 3X more effective than others to train your dog to obey basic commands and correct bad habits of barking, biting, digging, etc. Uvzsda dog training collar, your perfect helper! In great condition works perfect with no defects Paid $70 new