[Sturdy and Durable Metal Texture] Our timer lock box is made of sturdy and metal material, ensuring long-lasting durability and providing a secure storage solution for your items. Once the box is locked, it cannot be overwritten. [Powered by Battery or USB Connection] This phone locker is powered by 4 AA batteries (not included), and it also features an external Type-C port in case the battery dies. 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, serving 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, with a maximum lock time of up to 365 days. It's great for short-term goals and long-term commitments. [Safety Lock Box] A creative and meaningful tool for those who struggle with self-control regarding cell phones, games, or electronics. The mobile phone lock box is designed with a child lock button to 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 a responsive customized digital display, this multifunctional user-friendly time lock box is very easy to use. It helps change bad habits at work or study, and is suitable for people who overuse electronics during social activities, are addicted to video games, or are distracted by their phones. It can also be used as a medicine lock box. Color: Black Material: Metal Package Contents: 1 x lock box 1 x power cable