evidence: In 2004, India adopted Electronic Voting Machines (EVM) for its elections to its parliament with 380 million voters casting their ballots using more than one million voting machines.[30] The Indian EVMs are designed and developed by two government-owned defence equipment manufacturing units, Bharat Electronics Limited (BEL) and Electronics Corporation of India Limited (ECIL). Both systems are identical, and are developed to the specifications of Election Commission of India. The system is a set of two devices running on 7.5 volt batteries. One device, the voting Unit is used by the voter, and another device called the control unit is operated by the electoral officer. Both units are connected by a five-metre cable. The voting unit has a blue button for each candidate. The unit can hold 16 candidates, but up to four units can be chained, to accommodate 64 candidates. The control unit has three buttons on the surface – one button to release a single vote, one button to see the total number of votes cast till now, and one button to close the election process. The result button is hidden and sealed. It cannot be pressed unless the close button has already been pressed.