The state Office of Elections has chosen a Texas company to supply ballot counting machines for the May 22 special election to fill a vacant U.S. House seat.

Chief elections officer Scott Nago said Hart InterCivic of Austin has signed a $389,000 contract to provide about 350,000 ballots and envelopes, as well as electronic voting machines and counters for the mail-in special election.

Voters should receive ballots by mail in late April or early May, and those will be due back by May 22. Walk-in voting stations will be provided at Honolulu Hale.

Hart also will similarly supply the state with equipment for the regular primary and general elections later this year, and during the next six years under a separate $11 million contract.