Extended Range Training System: E-Collar PE-900 1/2-mile range trainer designed for small to medium sized dogs 10 pounds and up with neck size 5 to 22-1/2 inches, loaded with unique features making it a humane and effective trainer available Precise Control Display: LCD display with backlight allows for precise control during training sessions Customizable Stimulation Levels: 256 levels of smooth blunt stimulation with 100 Levels displayed on the LCD for tailored training intensity Multiple Training Modes: Seven stimulation modes to choose from, providing versatility for different training scenarios and dog temperaments Comprehensive Warranty Coverage: Two-year warranty on registered products against manufacturer defects with one-year coverage on accessories and free live US phone support Waterproof and Durable Design: Waterproof collar receiver and transmitter with odorproof Biothane collar ensures reliable performance in all weather conditions Night Tracking Features: Built-in tracking light on transmitter allows you to flash or continuously light up the collar receiver for locating your dog after dark