A voltage converter includes a converter circuit, a casing, and a jumper member. The converter circuit includes a voltage level setting circuit configured for generating a feedback signal, wherein an output voltage generated by the converter circuit has a voltage level that is determined according to value of the feedback signal. The voltage level setting circuit includes a plurality of first electrical components and a first common line. The casing receives the converter circuit, and is formed with a set of first jumper holes corresponding to the first electrical components, and a second jumper hole corresponding to the first common line. The jumper member connects selected ones of the first electrical components to the first common line upon insertion into the first and second jumper holes. The value of the feedback signal is dependent upon connection status of the first electrical components to the first common line.