As a tool used every day, the layout is clear at a glance, but it is difficult for blind people to find the location of the socket and distinguish which socket is idle. Therefore, the traditional plug is improved for blind users, only some simple shape changes are made, and the internal structure remains unchanged. Blind people only need to touch the edges and corners of the plug to find the gap, and slide the plug down the sliding slot to insert it. The plug has four sides and two sockets on each side, blind people can easily distinguish idle positions and fast entrances by touch. This solution has the same plug-in cost and is also convenient for ordinary users to operate blindly.