Metal Body: The Lock body is made of metal, Sharp edges and smooth surfaces, enhanced textured metal lock.Durability and Security. 99 Hours: The maximum time is 99 hours and 59 minutes. Lock once you setting and starting it, after time run out it will unlock and open automatically. Please set the time reasonably Easy Operate: Samll LCD with backlight, display the unlock time soft and clear, 3 small buttons to set hours or minutes, easy to use. Widely Use: The metal time padlock can lock up addictive objects, such as cell phone, cigarettes, snacks, drinks, greatly perfect for kitchen, school, gyms, etc. With a compact size, it's lightweight and suitable for airport and travel. You can lock yourimportant items at any time to guard your privacy. Improved Sleep Quality: Reduce the time of looking at mobile phones, fall asleep early, improve sleep quality, enhance immunity, and live a good life, Control smoking: limit smoking, reduce the number of cigarettes per day, gradually extend the interval,and cultivate good living habits