Firmware version is 1.62 rev68207. It comes with the correct power supply. There are a few minor issues: some screws are rattling inside the console, and the sides are sticky due to plastic deterioration, but it still works perfectly.

Using this Allen & Heath GLD - 80 digital audio mixing surface is quite straightforward. First, make sure you connect it to the correct power supply that comes with it. When you turn it on, you can start adjusting the audio settings according to your needs. Regarding the minor issues, the rattling screws inside don't affect its normal operation, but you might want to keep an ear out for any changes. The sticky sides are due to plastic deterioration. To maintain it, avoid exposing it to extreme temperatures and humidity. Clean it gently with a soft, dry cloth regularly. And if you encounter any major problems, it's best to contact the manufacturer or a professional technician.