A new gadget that makes sure you mouse keeps moving so your computer doen't shut down mid-download has been launched in the UK.

Called the Mouse Jigger, the device, available from AM Micro is portable and automatic with no software to install or run. Mouse Jiggler simply plugs into any empty USB port and goes to work instantly.

The company say that Mouse Jiggler is for anyone who needs to download a big file, run an install or perform a backup without worrying that their computer will fall asleep and interrupt the process.

There are two versions available - the MJ-1, which uses constant slow motions to allow use of the computer while Mouse Jiggler works, and the MJ-2, a version that uses large, jerkier motions to show at a glance Mouse Jiggler is working. Both products cost £22.95.