SODIAL(R) NEW LCD 100LV Level Shock Vibra Remote Pet 2 Dog Training Collar For 10lb-130lb The Remote Trainer has 2 components: 2 collar device (receiver) and a hand- held remote control unit. It uses vibration or micro static shock to modify your dog's behavior and a whistle tone reward for positive reinforcement. You can use this product to deter them from such behaviors as digging, getting into the trash, chasing cars, stealing food from the counter, running away from you, etc.