Good evening
The Technistar K4 ISIO (DVB-C, Cl+ slot) has a slot for the SRG Sat Access card, so it is compatible.
Have fun!

This receiver is designed for DVB-C (C=Cable) and not for DVB-S or DVB-S1 (S=Satellite). It is therefore not suitable for SRF satellite access.

A receiver for the SAT-Access card must support DVB-S or DVB-S2 as described in article number 33862961.
To use the card, you must be able to insert it into the receiver.
Some receivers have a Viaccess slot (rare) in which you can insert the satellite access card directly, if not, most receivers have a CI+ slot. However, this in turn means that a CI module for Viaccess is required for the receiver, such as article number 10850345 at Digitec. The compatibility of this specific module with the SRF Sat-Access card is certified from version 5 to 7 of the card. The Sat-Access card is then inserted into this module. It should then work.

You can find out more about the SRF Sat-Access card at broadcast.ch.

I don't think so, as this is a DVB-C receiver, i.e. it is suitable for cable reception. In my opinion, satellite reception is not possible, but I cannot test this.