It is the latest must-have gadget for the environmentally aware - and will come in rather handy for the more forgetful among us as well. Dubbed the “greenPod”, this is the world’s first wind-up music and video player. The brainchild of Trevor Baylis, the inventor of the clockwork radio, it can play music for an astonishing 20 hours before needing to be charged. This is done by cranking a fold-up handle at the rear.

Turning it for only a minute produces enough power to play 40 minutes of songs - a boon for music lovers who don’t remember to charge their iPod before they leave the house. Officially called the Eco Media Player, it can store up to 500 songs and comes complete with an FM radio, torch, voice recorder and video player. It costs around £140 and even doubles as an emergency mobile phone charger.

Crank it up: The Eco Media Player can store up to 500 songs and comes complete with an FM radio, torch, voice recorder and video player!