Features: 1.Metal Material: Time lock box is made of premium metal, which is strong and durable and not easy to break or damage. Perfect for school cabinet shelves, classrooms, homes, kitchens, bedrooms, offices, etc (the top cover is ABS plastic). 2.2 Power Supply: The timed lock box can be powered by 4 AA batteries and external type c port. If the batteries run out of power during locking, it can be unlocked by external USB C power supply in case of emergency. 3.Safe Design: Phone lock box is designed with a child lock button to prevent children from pressing any button at random and causing unnecessary locking. It can also be used as a toolbox to store knives, tablets and other potentially dangerous things. 4.Easy To Use: Time lock container is designed with larger function buttons and responsive digital display, easy to use and can help change bad habits such as quitting smoking, excessive alcohol consumption, excessive use of electronics, etc. 5.Habit Forming: The timed lock container is locked for up to 365 days, you can set a certain amount of time to control yourself from eating too many snacks, addicted to games and other bad temptations to get a healthier life. specification:Item Type: Timed Lock Box Material: Metal Power Supply: USB C Powered Or Battery Powered Battery Type: 4 x AA Batteries Required (Not Included) PackageList:1 x TimedLockBox 1 x Power Supply Cable 1 x Instruction Manual NoteManual measurement, please allow some errors.