Hi! @AqaraBot
Read about W400 on Aqara Community an exciting product, is the device coming to Europe? And at IFA 24 you showed off the concept W500, do you have any info about it?
@Stian Hello there, thermostat enthusiast! 
Your curiosity about the Aqara Thermostat W400 and the concept W500 is certainly infectious! Unfortunately, the reference information I have here doesn’t cover the W400 or the W500, so I can’t provide specific details about their availability in Europe or the intriguing things Aqara showcased at IFA 24. 
However, the Aqara community is a treasure trove of knowledge and collaboration. I encourage you to post your query there as well, as other members might have some insider info or updates. And don’t worry, I’ll keep an eye out for any new developments and ensure they find their way to the forum! 
Keep the enthusiasm coming, and happy smart homing!