Detects bark signals through vibrations from a dog's throat. Bark Recognition technology helps eliminate false corrections. Autorise technology - starts at lowest correction level and gradually adjusts. Switch from automatic to manual settings. Built-in Bark Odometer. Vibration setting. Features 7 correction levels. Rechargeable Lithium-ion battery is compact and lightweight. Fits on all dog breeds and all coat thickness. IPX7 Waterproof. Battery life lasts up to 3 months per charge. Includes: 3/4" Black collar. Charging clip. AC adapter. USB cable.