[Sturdy and Durable Metal Construction] This timer lock box is made of high-quality metal material, ensuring long-lasting durability and providing a secure storage solution for your items. Once locked, it cannot be overwritten. [Powered by Battery or USB Connection] Many customers have reported issues unlocking phone lock boxes when the battery dies. This model is powered by 4 AA batteries (not included) and features an external Type-C port for emergency power. If the battery runs out during a lock period, the device can still be unlocked using external USB-C power. [Audio Alerts and Extendable Lock Time] The timer lock emits 7 beeps when the lock is about to activate and 1 beep when the lock period ends, serving as a useful status reminder. Audio prompts can be disabled if desired. Users can extend the remaining lock time before unlocking, with a maximum lock duration of up to 365 days, making it suitable for both short-term goals and long-term commitments. [Safety Lock Box] This device is a practical tool for managing distractions caused by cell phones, gaming devices, or other electronics. It helps individuals who struggle with self-control, including children. The lock box includes a child lock feature to prevent accidental or unauthorized button presses. [Multifunctional and User-Friendly Design] Featuring large function buttons and a responsive digital display, this time lock box is easy to operate. It supports habit-building in work, study, and social settings by limiting access to electronic devices. It can also be used to securely store medication or other items requiring timed access. Color: Black Material: Metal Package Contents: 1 x Lock Box 1 x USB Cable Note: Light reflection and differences in display screens may cause slight variations between the color of the item in the image and the actual product. Measurement error is +/- 1-3 cm.