To use this charging case, simply place your Chauvet Freedom Strip Mini fixtures inside and connect the power supply. It's designed to charge up to four fixtures at once. Make sure the fixtures are properly positioned in the case for efficient charging. Since two fixture navigators are missing, you may need to find alternative ways to manage the fixtures if those navigators were important to you. When it comes to maintenance, keep the case clean and dry. Avoid exposing it to extreme temperatures or moisture. Also, regularly check the power supply for any signs of damage. This will help ensure the case continues to work well and charge your fixtures effectively.