Nintendo Co. unveiled a mobile digital TV tuner Wednesday for its popular portable game console Nintendo DS.

The tuner, a receiver card with built-in antenna, is inserted into the console's game slot.

The company did not give a date for the product's release but said it hopes to introduce it around the time new terrestrial digital TV broadcasting services are launched in April.

The new "one-segment" broadcasting service with Nintendo's game console is the latest gadget to join the array of cell-phone handsets, car navigation systems and other mobile devices capable of receiving the broadcasts.

The tuner is one of a range of products the firm is developing to expand the console's functions beyond game-playing. It also said the same day that it will release Internet browser software for the DS, enabling users to access the World Wide Web using the console.

Nintendo President Satoru Iwata expressed confidence in the future of the DS, saying he expects total domestic sales to top 10 million units this year.