1.Powered by Batteries or USB Connection Our timer lock box provides 2 charging methods. For daily use, please use 4xAA batteries(no included). Besides, we also offer an external typeC port in case of dead batteries, so even if the batteries run out during locking, you could still unlock our time release lock box through the external USBC power supply. 2.Charger Cable Hole Child Lock Stay while your devices are securely locked away. Our time lock safe includes a strategically placed hole for a charging cable, allowing you to charge your devices while they are stored inside. With the child lock button, you can keep your items safe from curious little hands. This feature adds an extra layer of security, ensuring that children cannot tamper with the device unintentionally. 3.Quality Solid Metal Instead of and fragile plastic box as other offer, is meticulously crafted from grade solid metal. It has security and durability to protect your items and resist any damage. The small timed lock box inner size: 8.03x5.33x1.97inches. 4.Once Locked No Override This is an absolute selfdiscipline phone lock box. Once set, there is no override until the timer is end! The lock box with timer makes 7 times of Di sound when locking is about to activate, you can press any button to cancel the lock during Di sound, the 7 Di sound allows you to hesitate, so please doublecheck the timer before locking!