1.Safety Lock Box: A useful tool for those everyday cell phone/game/electronics addicts that can be used to lock away tempting items when your child lacks selfcontrol. And our mobile phone lock box is designed with a child lock button, which can effectively prevent children from pressing any buttons accidentally, causing unnecessary locks. 2.Powered by Battery or USB ConnectionOur phone locker is powered by 4 AA batteries (not included), and we also provide an external TypeC port in case the battery dies. So even if the battery dies during locking, the timedrelease lock box can still be unlocked via external USBC power in an emergency. 3.Audio Alerts and Extendable Lock TimeThe timed locker beeps 7 times when the lock is about to be activated, and 1 beep when the lock time is over, which can serve 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 for shortterm goals and longterm commitments. 4.Sturdy and Metal TextureOur timer lock box is made of sturdy and quality metal material, ensuring longlasting durability and providing a secure storage solution for your items. Once it is locked, it cannot be overwritten.