High-quality Material: This time lock box is made of acrylic, strong, durable and easy to clean. Maximum setting time: 999 hours, 59 minutes and 59 seconds, minimum 1 minute. The cover will open automatically after the timing is completed. Prevent Addiction: The time lock box helps effectively controls and manages your time, controls cell phone addiction. Use this airtight timer lock container to develop good habits and lock in addictive items such as cigarettes, toys, mobile phones, snacks, etc. Unlocking Design: No complex operations, just set the time, when the set time is reached, the lock box will automatically open. Specification: Color: White, Black, Blue Material: Acrylic Size Chart: Diameter: 150mm 5.91inch Height: 165mm 6.50inch Package Includes: 1 Piece Timing Phone Box (Not included 2AA Batteries) 1 Piece USB Cable Note: 1. If the battery is not installed or dead, after locking, please connect the charging cable immediately. 2. Please allow slightly error due to manual measurement. 3. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 4. Wish you a wonderful on-line shopping!