The invention provides an electronic device, which comprises a displayer and an expansion base. The displayer comprises a first connector. The expansion base comprises a second connector. The first connector comprises a first tongue piece and a plurality of pins. The pins at least comprise a pair of differential signal transmission pins and a plurality of grounding pins. The orthographic projection of at least one of the grounding pins on the upper surface of the first tongue piece is located between the differential signal transmission pins. The differential signal transmission pins transmitinformation according with universal serial bus 3.1, lightning 2 or lighting 3 transmission specifications. The second connector comprises a second tongue piece and a plurality of through holes. The through holes at least comprise a pair of differential signal transmission through holes and a plurality of grounding through holes. The differential signal transmission pins and the grounding pins areinserted into the differential signal transmission through holes and the grounding through holes respectively.