Mr Clement Oha, the Administrative Secretary of the commission, told the News Agency of Nigeria in Lagos on Saturday that the number was twice higher than the number needed for the election.
NAN reports that the bye-election is as a result of the death of Mr Elijah Adewale, who represented the constituency in the House of Representatives.
Adewale died in Abuja on July 20.
Oha said there were only 687 polling units in the constituency.
“We have prepared a good number of card readers for the election. We have assembled more than 1,500 card readers for accreditation of eligible voters.
“We are charging these card readers and taking adequate steps to ensure that none of them fails. If any fails, because they are machine, we will fix it, or replace immediately.
“We have made adequate preparations; card readers have helped us to reduce multiple voting,” he said.
Oha gave the assurance that INEC would provide a level playing ground for all political parties to enable a free and fair election.
The INEC boss urged all political parties and their leaders to advise there supporters against violence.