The simplest version to mount a Raspberry Pi in a Checkmate A1500 case.
This is a mounting frame on which the Pi can be mounted.
An included circuit board leads the side connectors to the back of the frame, and the Pi's other connectors go directly to the back.
Not included is a solution to connect the power switch as well as the power LED of the Checkmate case. If you want to use these, you have to come up with a solution yourself.
The Pi is supplied with power via a USB-C power adapter as usual.
If you want to use an internal power supply, you are better off with the Van Helsing Pack - it includes a corresponding board and a power supply. The power switch and the power LED are also connected here.
Besides a pre-installed SD card.