Sounds like the AT220:
https://nzautotraps.com/
The use of photoeyes (infra-red beam) on the one that can do mice seems dangerous for non-targets.
Looks promising otherwise - I see several potential issues that might be exposed quickly such as the radius of the corners of the enclosure being to sharp - needs to be a smoother radius too prevent rats chewing them open (smoother than a rats mouth gape can grab onto). A rat/several rats could get into it and destroy the wiring very quickly.
The pull type trigger might be a barrier to efficient control of rats as it can be variable whether they will do this. While the AT220 doesn't seem to be targeted for the stoats I would be as bold to say that they would not set off such a trigger. Bait life will also be an issue - I've informally tested "long-life" baits that are supposed to last for months that have no smell after days - Suspicious at best on their long-term efficacy.
Some learnings from the Goodnature A12 and A24 traps (CO2 self resetting possums and rat/stoat traps) could be transferred to speed up development it seems.