10pcs DC-DC 7.5-28V To 5V 3A Step-Down Power Supply Module Cellphone Car Charger USB Buck Regulator
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They came packed in esd safe bags. At the back some white paste which was easy to clean. tried 3 and all 3 have an ouput of 4.995 to 5.08 volts which is very acceptable. Soldering looks good and inputs are very easy to solder. For the price they are very good. The only drawback is the lack of holes to attach them to something.
Looks like they are pretty good!
unfortunately, this didn't drive a raspberry pi 3b+ . deploying it on another 5v application did work, however.
Good product, works properly. Shipping pretty fast. Good salesman.
GOOD AND FAST
excelente produto entrega muito rápida ! Parabéns
working as described
ممتاز
Perfect if you're messing with robots or Raspberries.
Wszystko OK