[Robust and Durable Metal Structure] Our timed lock box is made of strong and durable high-quality metal material, ensuring long-lasting durability and a secure storage solution for your items. Once locked, it cannot be overwritten. [Battery or USB Powered] Many customers complained that they couldn't unlock the phone lock box if the battery was dead. Our phone box solves this problem. It is powered by 4 AA batteries (not included), and we also provide an external Type-C port if the battery runs out. Therefore, the timed lock box can still be unlocked with external USB-C power in an emergency, even if the battery runs out during the locking process. [Sound Alarm & Extendable Lock Time] The timed box emits 7 beeps when the lock is about to activate and 1 beep when the lock time is over, which can serve as a useful reminder of the box's status. You can also turn off sound notifications if you wish. This phone jail allows you to increase the time remaining before unlocking. The maximum lock time is up to 365 days. It's perfect for short-term goals and long-term commitments. Safe Lock Box: A meaningful tool for those with daily dependencies on cell phones/games/electronics that can be used to lock away tempting items when your child lacks self-control. And our cell phone lock box is designed with a child safety button, which can effectively prevent children from pressing any buttons at will, causing unnecessary locking. Multifunctional, Practical, and User-Friendly Design: Besides larger function buttons and responsive customized digital display, our multifunctional user-friendly timed lock box is very easy to use and can help us change bad habits in work, study habits. Or it can also be used as a medicine box for people who overuse electronics during social activities, are addicted to, or are distracted by their cell phones. Color: Black Material: Metal Package Content: 1 x Lock 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 actual item. The measurement tolerance is +/- 1-3 cm.