Question about Climaexpert CoolAir Split 4.0 Super Silent Eco

This is clear to me.
Is it possible to extend the "small" cable, which is probably rather thin? Especially with this device. If so, with which extension? Thank you for the precise answer to this question.

Haven’t received yet but no need for extension hose with the split unit. The fan sits outside, connected by a small cord that runs indoors to the cooling unit.