Feature: 1. ATTENTION CONCENTRATION: It aims to help students concentrate on their studies and avoid distractions by effectively curbing their dependence on the phone. 2. CULTIVATE SELF DISCIPLINE: This cell phone lock box helps students develop better internet usage habits, improve study efficiency, and cultivate self discipline. 3. CREATE A STUDY ENVIRONMENT: By locking up smart devices such as cell phones, it helps you create an environment of concentration conducive to studying. 4. FLEXIBLE LOCKING SETTINGS: You can customize the locking time according to your needs, which meets the needs of different scenarios and is more flexible and convenient to use. 5. EFFICIENT STUDY: This cell phone lock box can help students plan their study time and rest time reasonably and flexibly, making learning more efficient. Specification: Item Type: Phone Lock Box Material: Aluminum Alloy Battery Type: 4xAA (Excluded). Package List: 1 x Mat1 x Phone Lock Box1 x USB Data Cable Note: 1.If the battery runs out during the locking process, resulting in failure to unlock, you can unlock it by external power supply emergency.2. When the external power supply and battery are connected at the same time, the external power supply will be used in priority and will not consume the battery power. (If you do not use the timer lock box for a long time, please remove the battery.)