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File:Vintage Beltone Tempo Transistor Eyeglass Style Hearing Aid (Hearing Glasses), Sales Model, Made In USA, Circa 1967 (15069206841).jpg - Wikimedia Commons
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BLU – World's Most Versatile Hearing Glasses: A high-tech pair of hearing glasses with Bluetooth for audio streaming and handsfree calling - AndeanWire
![File:Vintage Beltone Tempo Transistor Eyeglass Style Hearing Aid (Hearing Glasses), Sales Model, Made In USA, Circa 1967 (14885604170).jpg - Wikimedia Commons File:Vintage Beltone Tempo Transistor Eyeglass Style Hearing Aid (Hearing Glasses), Sales Model, Made In USA, Circa 1967 (14885604170).jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/5/51/Vintage_Beltone_Tempo_Transistor_Eyeglass_Style_Hearing_Aid_%28Hearing_Glasses%29%2C_Sales_Model%2C_Made_In_USA%2C_Circa_1967_%2814885604170%29.jpg)