Metal Body: The lock body is made of metal with sharp edges and smooth surfaces, featuring an enhanced textured metal design for durability and security. 99 Hours: Maximum timer setting is 99 hours and 59 minutes. Once set and activated, the lock will automatically unlock when the time expires. Please set the timer appropriately. Easy Operation: Features a small LCD with backlight to clearly display the remaining time. Equipped with three small buttons to easily set hours and minutes. Wide Application: This metal time lock can secure personal items such as cell phones, cigarettes, snacks, and drinks. Ideal for use in kitchens, schools, gyms, and more. Compact and lightweight, suitable for travel and airport use. Helps protect your privacy by securing important items. Improved Sleep Quality: Helps reduce screen time before bed, encouraging earlier sleep and better sleep quality. Supports healthier daily routines. Control Smoking: Assists in limiting smoking by controlling access to cigarettes, helping reduce daily consumption and gradually increasing intervals between use, promoting better habits.