Google Glass
Google Glass is no longer on sale to consumers, but may soon reappear as a family of productsGoogle

Details of the replacement for Google Glass have leaked, and it is understood Google is working on two new wearables.

One of the new head-mounted products will have a screen and be aimed at enterprises, while the second will be targeted at sport-focused consumers. This model will rely solely on audio or the user to communicate with it, likely employing a similar "OK, Google..." command as the company's phones and smartwatches.

Both gadgets, and a third that Google is reportedly working on, will use "bone conduction" to deliver sound to the wearer. This means that the device vibrates against the side of your head to deliver sound to your inner ear, instead of placing a speaker next to or inside the ear itself.

A report by The Information says: "People tell us there have been three versions of the head-mounted device in development, although the three may be consolidated into two. One version, targeted at enterprises, has a screen, The others, one of which is targeted at 'sport' users, doesn't and relies on audio."

After being withdrawn from sale at the start of 2015, the Glass project is being run by former Apple executive and "father of the iPod", Tony Fadell.

Glass was revealed in 2012 and went on sale to the general public for £1,000 at the start of 2015, but poor battery life and limited uses meant the device failed to take off.

It is likely that Google will focus the next generation of Glass at enterprise, where it can be used to provide heads-up information to all manner of workers, from surgeons and pilots to warehouse staff and receptionists.

Previous reports have claimed the new Glass will have improved battery life and Wi-Fi, better heat management thanks to a new processor, and the option to connect an external battery.