The appliance is noisy. We have some Beamer but this is really loud. He might not have thermal fan control or existing malfunctioning. Also missing - at least during operation via the HDMI port - a possibility to adjust the horizontal geometry. We asked the suppliers to these two points, the answer was:
"We are very pleased about your interest in our equipment.
Unfortunately over the already mentioned in the product description the manufacturer no further technical details of this product are known.
We would love to have you nevertheless welcome as customers soon. "