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These little dehumidifiers are widely available under several brand names and with wildly varying prices for the exact same units.
They are usually described as 300ml or 500ml dehumidifiers although that does not in any way relate to their daily extraction performance.  In short these work for very small spaces, but are not as efficient as traditional compressor or desiccant drum dehumidifiers.  If you buy one to keep a room dry you may be disappointed, but for a small portacabin or camper they may actually be a viable option.
They're very quiet due to the only moving part being a computer style fan.  The two main components, the fan and peltier array both operate directly on 12V so it's actually viable to run one of these from a small solar panel.  Note that the operating current is 3A.

The main failure modes of these things are probably the fan bearing going noisy due to it's low cost and the power supply failing due to the relatively heavy load of 3A at 12V and inevitable cost cutting.

The design is very…