This is for the combo kit.
Before this, I couldn't find it for less than 97€.
On pricewatch-tweakers it shows Bol.com
had the same price. But it's not available anymore (can only guess that Amazon has compared the price).
I think it's better to take the combo kit instead of just the device as the add ons worth much more than 15€.
Pardon mijn Engels allemaal. (Working on my Dutch)