Main Parts : 
Power Jack x 2                      
Hall Sensor x 1
LED x 2 
2-pin Stackable Header x 1
Quiescent output voltage : 1.00(S) - 2.50 - 4.00(N) V
Brick Unit : 5 x 4

Note : 
When North magnetic pole moves toward Hall sensor, output voltage closes to 4V and red LED lights up
When South magnetic pole moves toward Hall sensor, output voltage closes to 1V and green LED lights up