Christopher Jung charging up his ring-pull phone

Numéro d’image : 11893296
Christopher Jung charging up his ring-pull phone
Ring-pull mobile telephone. Designer Christopher Jung (born 1969) winding up a prototype of his ring-pull mobile telephone. This battery-free tel- ephone 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. Dialling is done on the yellow keys around the disc's edge. Also,speaking a name into the microphone causes it to automatically dial their number from its address book. Jung designed this award-winning device while at University of Berlin,Germany
Licence : Droits gérés
Crédit: Science Photo Library / Steger, Volker
Taille de l’image : 3436 px × 4864 px
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