The makers of a handheld ZX Spectrum console announced issues with its button, which will cause a delay in the console's release. The console, which has the support of English inventor Sir Clive Sinclair, is a much awaited device designed for old-fashioned gamers.

The Sinclair ZX Spectrum is the most talked about retro console of 2015, and the only one endorsed by Sir Clive Sinclair. It is designed and manufactured in the U.K., the home of the original ZX Spectrum revolution. It improves on the original, with no more waiting for a game to load via tape. The console is rated by PEGI which is suitable for all adults and children aged seven and up.

The retro gaming console received almost £500,000 ($0.6m) in crowd funding earlier this year and was due to ship in September. It features 1,000 pre-installed games which allow gamers to play any ZX Spectrum game using micro SD Card slot. Well-known retro gaming sites carry tens of thousands of titles that you can legally download. Players can even play games they have programmed.

The firm has claimed in an update on its Indiegogo page titled regarding "A Pain in the Buttons", where they said that testing had been trickier than expected.

"This change has caused a brief delay and we are truly sorry about that, but we needed this time to improve the product and we have now completed the necessary revisions and we are delighted to announce that we will ship the first units in February 2017," wrote the company's representative Suzanne Martin.

Retro Gaming Computers Limited has told the BBC the first batch will now ship in February 2017.