This is the same assembled and tested power supply unit that is in the A-100 DIY Kit #1.
Output: +12V DC/1200mA, -12V DC/1200mA.
Because you are dealing with low dc voltage and not mains voltage it is suitable for DIY case installations.
A +5V supply can be achieved by adding the A-100AD5 / +5V adapter to your chosen bus board.
The dimensions are 110mm x 80mm x 50mm high.
The input jack is 2.1mm center pin positive needs to be used with 15V AC/2500mA external transformer such as the one shown below.
NOTE: this power supply must be used with 15V AC transformer.