There are 2 campingaz xcelerate camping cookers on sale: one 164. has the xcelerate in the title, the other does not (but the description says it has xcelerate technology) and it only costs 101. as there is no description of the more expensive one, you can't tell the difference.

The Campingaz Xcelerate 400 SG is an improved version of the Campingaz 400 SG that features Xcelerate burner technology, better performance, stability and grilling capabilities.