The Pet Life ® Ellipse LED 1-to-3 Dog 16-Level Vibration Sound and Stimulation Training Dog Collar features up to 16 intensity levels of Sound, Vibration and Electronic Stimulation that operates at a long distance range of approximately 550 Yards. The Transmitter device has the ability to toggle between 3 Receiver Collars (additional receivers sold seperately). The transmitter is equipped with an LED Display screen where the user can view the adjustable intensity levels, channels and modes. The Transmitter and Receiver is Waterproof and features a safety keypad lock to protect against accidental usage with an Auto-off Power Saving feature to conserve battery.