The SportDOG Brand YardTrainer 100S Electronic Dog-Training Collar offers a higher range of static stimulation, specifically for large or stubborn dogs. This is a great electronic dog collar for basic obedience training around the house, yard, park, or any situation where the dog is within 100 yds. of the trainer. Choose from 3 stimulation types: vibration, tone, or static; and 8 levels of static stimulation. Each stimulation type has a dedicated button, allowing you to easily deliver the stimulation that best suites the training situation or your dog's temperament. DryTek® technology makes the unit waterproof and submersible to 25'. Both the transmitter and the receiver run off rechargeable Lithium-Ion batteries (included). The YardTrainer 100S Electronic Dog Training Collar includes transmitter, receiver with collar, lanyard, charging cable, long contact points, test-light tool, and basic training instructions with pro trainer Charlie Jurney.