EVMs are electronic voting machines which enable the voter with a button for each choice. It is attached by a cable to an electronic ballot box. It comprises of two units – control unit and balloting unit. They are connected by a 5-metre cable. The EVM runs on a 6-volt single alkaline battery fixed in the control unit. It can even be used in areas that have no electricity.
The control unit is with the Election Commission selected polling officer. The Balloting Unit is in the voting section into which the voter enters to cast their vote in secret by pressing the button against the name and sign of the candidate of their choice.