Robust and Durable Metal Construction Our timer box is crafted from robust, high-quality metal, ensuring long-lasting durability and providing secure storage for your items. Once locked, it cannot be overridden. Battery or USB-Powered Many customers complained about being unable to unlock the phone box if the battery died. Our phone box solves this! It's powered by 4 AA batteries (not included), and we also provide an external Type-C port as a backup. Even if the battery runs out while locked, the timed box can still be unlocked via external USB-C power in an emergency. Audible Alerts & Extendable Lock Time The timed box beeps 7 times as the lock is about to engage and once when the lock time is up, providing a helpful reminder of its status. You can also disable sound alerts if preferred. This mobile phone jail allows you to increase the time remaining before unlocking. The maximum lock time is up to 365 days. Perfect for short-term goals and long-term commitments. Safety Lock Box: A meaningful tool for those who are dependent on mobile phones/games/electronics in daily life, which can be used to lock tempting items when your child lacks self-control. Our phone box is designed with a child safety button, effectively preventing children from pressing any buttons at will, causing unnecessary lockups. Multifunctional, Practical & User-Friendly Design Featuring larger function buttons and a responsive custom digital display, our multifunctional user-friendly timed box is very easy to use and helps us change bad habits at work, in studies, or for individuals who overuse electronics during social activities, are addicted to, or distracted by their phones. It can also be used as a medication box. Color: Black Material: Metal Package Contents: 1 x Box 1 x Cable Note: Light reflection and different displays may cause the color of the item in the picture to differ slightly from the real thing. The allowable measurement error is +/- 1-3 cm.