I have the same question, looking to buy CarlinKit 4.0 but there are 3 different devices in the official Amazon Store Front:

https://www.amazon.com/Carlinkit-Factory-CarPlay-Android-Wireless/dp/B0B1TV4VGF?ref_=ast_sto_dp

https://www.amazon.com/Carlinkit-Achieve-Wireless-CarPlay-Android/dp/B0B1TZZ9K3?ref_=ast_sto_dp&th=1&psc=1

https://www.amazon.com/Carlinkit-4-0-Adapter-Wireless-CarPlay/dp/B0B1Q819KM?ref_=ast_sto_dp&th=1&psc=1

Which one should I buy? I heard there is a newer version, that is faster and with very low lag

Thank you, the issue is that in the store there are 3 different devices, similar description and prices though, I am confused which of the 3 I should buy:

https://www.amazon.com/Carlinkit-4-0-Adapter-Wireless-CarPlay/dp/B0B1Q819KM?ref_=ast_sto_dp&th=1&psc=1

https://www.amazon.com/Carlinkit-Achieve-Wireless-CarPlay-Android/dp/B0B1TZZ9K3?ref_=ast_sto_dp&th=1&psc=1

https://www.amazon.com/Carlinkit-Factory-CarPlay-Android-Wireless/dp/B0B1TV4VGF?ref_=ast_sto_dp

Which one would you recommend?