I own a not so low-tech Casio Wave Ceptor for more than a decade. It has a solar cell and adjusts itself via radio so I never had to do any maintenance since I

I own a not so low-tech Casio Wave Ceptor for more than a decade. It has a solar cell and adjusts itself via radio so I never had to do any maintenance since I own it. I actually fear the day when it breaks down.