Timer Max 99 Hours Adopting backlight LCD display, there are 3 buttons which can be set to hours and minutes, the longest time is 99 hours and 59 minutes, and the "lock" button " in the middle is used to set and start it. After the time is up, the digital padlock timer will unlock and open automatically. USB Rechargeable and Long StandbyWith built-in 3.7V/200mAh battery, the combination padlock can be rechargeable via equipped USB cable and run for over 500 hours, which is a great alternative to timer locked containers. Premium MaterialMade of premium metal with coating, the time lock padlock is durable and hard to rust. When the lock is locked, it does not open and it is impossible to break it by hand. Please set the time reasonably. Alarm and ResetWhen setting the time and counting down to zero, the smart timing padlock will ring to remind you to confirm the lock time or you can reset it. What's more, you can also switch to silent mode at any time. Widely UsedThe timed metal padlock can lock addictive items, such as cell phone, cigarettes, snacks, drinks, perfectly perfect for kitchen, bathroom, kitchen. school, gymnasiums, etc. With a compact size, it is lightweight and suitable for airport and travel. You can lock your important things at any time to protect your privacy.