Firmware version is 1.62. It comes with the correct power supply. However, there are some minor issues. There's a bit of light fader ghosting, and the rubber coating has deteriorated and become sticky.

To use this Allen & Heath GLD - 80 Digital Audio Mixing Surface, first make sure it's connected to the correct power supply. You can then start adjusting the faders to mix your audio as you like. Be aware that there is some light fader ghosting, so when making precise adjustments, you might need to double - check. Also, since the rubber coating is sticky, avoid touching it with dirty hands to prevent further soiling. For maintenance, gently clean the surface with a soft, dry cloth. Don't use any harsh chemicals on it as this might damage the device.