Hands charging up a ring-pull mobile telephone
Numéro d’image : 11893297
| Ring-pull mobile telephone. Hands charging up a prototype of a ring-pull mobile telephone. This battery-free telephone never needs charging from a mains supply. Pulling the cord a few times charges a generator in the disc-shaped telephone,which provides power for over five minutes of talking. The yellow circle on the telephone's surface is a pull-down microphone into which the user speaks. The yellow keys around the disc's edge are for dialling. Speaking a name into the microphone causes it to automatically dial their number from its address book. This award-winning device was designed by Christopher Jung (born 1969) while he was at University of Berlin,Germany | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library / Steger, Volker |
| Taille de l’image : | 3543 px × 2685 px |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : | - |
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