Daughter board w. 15cm cable
ai03 Unified Daughter Board. Used in for example the Bakeneko. M2 hex screws included (5mm in total length).
The UDB comes in two versions, C1 and C3. They are compatible with each other, but C3 features ESD protection on board. C3 version is recommended if choosing between them. C1 version is only recommended if there is already ESD-protection on the main PCB.