Hi,
The difference between the pre-programmed kit and the none programmed is that the pre-programmed has the colorimeter firmware uploaded to the arduino board?

Thanks for your answer! I am not happy with it, but thank you.

Hi! Same problem here. But under WIN7&WIN8.1 with colorimeter-v04.exe measurment program starts with no issue.

Hi! I've only find DHL express shipping as an international shipping method in your store. The only problem is, this type of shipping is just as expensive as a I buy another colorimeter. Do you have any other shipping options such as DHL standard shipping?