1. Material: The smart time lock is crafted from quality metal, ensuring robustness to prevent unauthorized opening. It is durable and resistant to rust. Once locked, the lock cannot be opened. Please set the time appropriately. 2. Wide Application: This heavyduty metal electronic timer lock can secure addictive items such as mobile phones, cigarettes, snacks, drinks, and more. Its compact and lightweight design makes it suitable for airports and travel. You can lock your important items anytime to safeguard your privacy. 3. USB Rechargeable Long Standby: Equipped with a builtin 3.7V/200mAh battery, this multifunction time lock can be charged via the included USB cable. It offers over 500 hours of standby time. 4. Hour Timer: Featuring an LCD backlight display, the lock has three buttons for setting hours and minutes, with a maximum setting time of 99 hours and 59 minutes. The central lock button is used for setting and starting. Once the time elapses, the digital padlock will automatically unlock and open.