The storage box with timer and combination lock is made of thick PP plastic, ensuring sturdiness and resistance to deformation. It is designed to resist dust and water. The plastic construction makes the box safe, suitable for storing food and medicines. Two holes on the lid allow fresh air circulation for food. You can put your mobile phone into the box and charge your phone or any electronic device through these holes and keep the Wi-Fi on when you lock them. Two Switchable Working Modes: Timed Mode for Storage Box and Non-Timed Mode with automatic locking function.