Timer Max 99 Hours with Backlight LCD Display. Features 3 buttons to set hours and minutes, with a maximum time of 99 hours and 59 minutes. The middle "Lock" button is used to set and start the timer. When the time expires, the digital padlock will unlock and open automatically. USB rechargeable with built-in 3.7V/200mAh battery. Can be recharged via included USB cable and supports over 500 hours of standby time. A reliable option for timer-locked containers. Constructed from premium metal with protective coating, this time lock padlock is durable and resistant to rust. When locked, it remains secure and cannot be opened manually. Set the time appropriately for best results. Equipped with alarm and reset functions. The smart timer padlock sounds an alert when setting the time and when countdown reaches zero, reminding you to confirm settings or reset as needed. Silent mode is available for quiet operation. Ideal for securing personal items such as cell phones, cigarettes, snacks, and drinks. Suitable for use in kitchens, bathrooms, schools, gyms, and more. Compact and lightweight design makes it convenient for travel and use at airports. Secure your valuables anytime to protect privacy.