Using your personalized memorial light box is easy. First, find a nice spot on your table or desk to place it. Then, connect it to a desktop computer, laptop, or power bank with a USB input as it doesn't come with a wall charger. Once connected, use the switch to turn it on and adjust the brightness according to your preference. When not in use, simply turn it off using the switch. As for maintenance, gently wipe the acrylic surface with a soft, dry cloth to keep it clean. Be careful when handling it to avoid any scratches. Also, remember that due to manual measurement, there might be a small difference in size, so don't be surprised if it's slightly different from the stated 8 inches.