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南非的一个残疾人团体和英国发明家特雷弗·贝利斯共同研制开发出一种上发条的收音机。这种收音机可以为无电的贫困地区传播信息。 该收音机采用发条发电机产生电能,只要上二十秒时间的发条,就可以听四十分钟的收单机播音。贝利斯在电视上看到非洲边远地区村民因为没有电或者电池而无法获得关于艾滋病信息后,想出了这项发明。
A handicapped community in South Africa worked with British inventor Trevor Bellis to develop a clockwork radio. This radio can broadcast information for poor areas without electricity. The radio clock generator to generate electricity, as long as twenty seconds on the clockwork, you can listen to forty minutes of receiving machine broadcast. Bellis came to this invention on television after seeing villagers in remote areas of Africa fail to get information about AIDS because they have no electricity or batteries.