Anti-barking device: AVOX Max, compatible with all dog breeds, includes a gas canister ⚫︎ Brand new, unused The package has wrinkles. ⚫︎ Stored item ※ Built-in battery Approximately 7000 hours 8 hours a day The expiration date may have passed. ⚫︎ Includes one refill canister ※ One is included in the main package. ⚠️ The built-in battery may be dead, so I am offering it at a bargain price. ※ From previous sales, buyers have contacted me to say it worked fine. ※ The paper package has wrinkles. Please check photo 9. ⚠️ Please refrain from purchasing if you are concerned about minor imperfections.