The Delta Sport is a 3/4-mile training collar with a built in bark-collar. The Delta Sport comes with tone, vibration, and 18 levels of momentary and continuous stimulation with a built-in BarkLimiter for home and kennel use. Expands up to 3 collars and has an easy-to-read LCD screen for viewing and switching between collars. Waterproof. Rechargeable lithium-ion battery.