This external battery pack box is designed to provide reliable backup power for your safe box. It ensures that your electronic lock remains functional during power outages, offering peace of mind and enhanced security. The compact design allows for easy installation and storage, making it an essential accessory for any security system. Features -Color:Black -Material:Plastic -Size:31.50X6.50X2.40cm/12.38X2.55X0.94in-Longlasting power supply: provides extended backup power for safes, ensuring the security of important documents and valuables.-Easy battery replacement: designed for simplicity, allowing for easy battery replacement without complicated steps.-Meets longterm usage needs: capable of meeting the longterm usage demands of safes.-Stable performance: offers stable performance and reliable safety, ensuring security during use.-Versatile applications: suitable for various scenarios such as homes, offices, and stores, providing reliable backup power solutions for different needsPackage list: 2 x boxes