About Bundle explain details : The Bundle simply stands for an output plug and does not mean anything else. Bundle 1 is DC:5.5*2.1/2.5mm ouput plug. Bundle 2 is Aviation-GX16 12.5mm(1+,3-) output plug Bundle 3 is RCA 10mm ouput plug Bundle 4 is 3-pin-XLR 18mm output plug Bundle 5 is Triangle output plug
