The manual is almost unusable. After 1 year and 9 months (connected to 115VAC) the green light on the back started blinking with no indication. In this regard, he stopped cooling. Using the 12V DC USB cable, the system rebooted and the green light stopped flashing. If it were more reliable it would be a useful feature. I would expect more than 21 months of service. It can still be used with 12V DC USB. Made in China - XS.
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