Emergency unlock in power outage: The time-locked lockbox can be unlocked in an emergency via an external USB-C power source, even if its internal power is exhausted. Power options: It runs on four AA batteries (not included) and also provides an external Type-C power port for backup when the batteries are depleted. Audible alerts and adjustable timer: The unit emits seven beeps when unlocking is requested and one beep when the lock time ends. Audio announcements can be disabled. The remaining time to unlock can be extended. Maximum lock time is up to 365. Suitable for both short term goals and long term commitments. Durable metal construction: Built from robust metal for long lasting durability. Once locked, the box cannot be overwritten, providing a secure storage solution for your items. Portable and practical: Designed as a portable, time locked storage option suitable for home, office, or travel. Use scenarios: - Personal valuables: securely store cards, cash, or keys and control when they can be accessed, even during travel or busy routines. - Shared spaces: dorms or offices can use timed access windows to limit use and prevent unauthorized access. - Long term planning: set a future unlock date for items you want to restrict access to over time.