BarkLimiter Deluxe, built with proven Tri-Tronics dog training technology, is the world's first intuitive electronic bark correction device. It uses accelerometer-based bark identification to distinguish between barking and other vocalizations. It's compact and lightweight, due to its slim, rechargeable lithium-ion battery (up to 3 months battery life). Even with integrated stainless steel contact points optimized to work on all dog breeds and coat thicknesses BarkLimiter Deluxe is still one of the most compact designs on the market. And it's ready to go right out of the box no set-up required. It's compact and lightweight, due to its slim, rechargeable lithium-ion battery.