Pingkay 23"x24" Puppy Dog Pet Training Wee Pee Pads Underpads 224pcs/448pcs/672pcs (448PCS) NEW ADVANCED DOG TRAINING COLLAR & REMOTE - advanced design that assures control on longer distances (30% more than the other electric shock dog collars). The ultra-durable, waterproof collar assures safe use for years to come.