TV streaming device Google Chromecast sold one unit every 4.5 seconds in Dixons Retail (Currys/PC World) stores on launch day.
Chromecast went on sale in the UK earlier this month, with Currys and PC World the first physical stores to stock the £30 gadget. It will go on sale in other physical retailers at the end of April.
"Google Chromecast continues to be a huge success for us," said Dixons Retail in a statement. "In the UK, we are the only bricks 'n mortar retailer selling it for now, and on opening day we were selling one every 4.5 seconds.
"But it is not just in the UK where the product has 'flown off the shelves'. Our colleagues in Norway had to race in an extra batch of 40,000 Chromecasts after selling out in the first week. It was also front page news in one of Norway's leading national newspapers."
Mark Hosgood, Category Manager for Tablets, Ereaders and Projectors at Currys & PC World, told The Daily Star: “Chromecast has been one of the most successful launch days, both online and in-store, in recent years, rivalling the likes of iPad tablets and Google's own Nexus device.
"Currys & PC World have the in-store exclusive and the unprecedented demand saw stores such as Oxford St sell out by mid-afternoon [on launch day]."
Google had sold 'millions' of Chromecast units before it launched in the UK. Tech Data is distributing the device across Europe.