[Sturdy and Durable Metal Texture] Our timer lock box is made of sturdy and high-quality metal material, ensuring long-lasting durability and providing a secure storage solution for your items. Once is locked, it cannot be overwritten. [Powered by Battery or USB Connection] Many customers complained that they could not unlock the phone lock box if the battery out. Our phone locker has solved this problem. It's powered by 4 AA batteries (not included), and we also provide an external Type-C port in case the battery dies. So even if the battery dies during locking, the timed-release lock box can still be unlocked via external USB-C power in an emergency. [Audio Alerts and Extendable Lock Time] The timed locker will beep 7 times when the lock is about to be activated, and 1 beep when the lock time is over, which can as a useful reminder of the lock box status. You can also turn off audio prompts if desired. This mobile jail allows you to increase the time remaining before unlocking. The maximum lock time is up to 365 days. It's great for short-term goals and long-term commitments. Safety Lock Box: A and meaningful tool for those everyday cell phone/game/electronics addicts that can be used to lock tempting items when your child lacks self-control s things. And our mobile phone lock box is designed with a child lock button, which can effectively prevent children from pressing any buttons at will, causing unnecessary locks. Multifunctional, practical and user-friendly design: In addition to larger function buttons and responsive customized digital display, our multifunctional user-friendly time lock box is very easy to use and helps us change bad habits at work, study Or for people who overuse electronics during social activities, are addicted to video , or are distracted by their phones, it can also be used as a medicine lock box. Colour:Black Material:Metal Size:About 21cm long Package Contents: 1 * lock box 1 * power cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.