This compressor could be useful for both big and small projects. One advantage of compressed air as a power source is lower energy costs than with electricity or petrol.
From OnBuy
Xiaomi Portable Electric Air Compressor 1S Battery Operated Electric Air Compressor/Air Pump (0.2-10.3 Bar/3-150 PSI, 5 Modes, 14.8Wh Battery, USB-C
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