Main Parts : 
Power Jack x 2
Variable Resistor x 4
10-pin Stackable Header x 2
Resistance : 1K / 10K / 100KΩ / 1MΩ
Left Header : VCC / A / B / C / GND / GND / F / G/ H / VCC
Right Header : VCC / S / T / U / GND / GND / X / Y / Z / VCC
Brick Unit : 8 x 5

Note : B, G, T, Y are wiper terminal of 1K,10K,100K,1M resistor