Metal body: The lock body is made of metal with sharp edges and smooth surfaces, enhanced textured metal latch. Durability and safety. 99 hours: Maximum time is 99 hours and 59 minutes. Lock when setting and starting it; when time is up, it will unlock and open automatically. Set time easily: Large LCD with backlight display, shows unlocking time softly and clearly; 3 small buttons to set hours or minutes, easy to use. Wide application: The metal time lock can secure items that trigger dependency, such as mobile phones, cigarettes, snacks, drinks, perfect for kitchen, school, gym, etc. With a compact size, it is lightweight and suitable for airports and travel. You can lock your important items anytime to protect your privacy. Improved sleep quality: Reduce time spent on mobile phones, go to bed early, improve sleep quality, enhance immunity, and live a healthy life. Control smoking: Limit smoking, reduce daily cigarette count, gradually extend intervals, and cultivate healthy habits.