Sony has launched a new waterproof android smartphone.

The Xperia Z Ultra can be used underwater up to a depth of 1.5m, even allowing people to take pictures and film video in full HD below the surface, the company said.

Launching it today, Sony claimed the handset, which has a 6.4-inch screen, has the biggest display and is the thinnest large-screen smartphone on the market.

The phone will include a Qualcomm Snapdragon 800 processor which Sony says is the world’s fastest processor.

The phone was launched today at the Mobile Asia Expo in Shanghai, alongside the Sony SmartWatch 2 SW2, a ‘second screen’ for any Android phone worn on the wrist.