When HN users recommended it
1 HN user recommended this in 2017, in one comment.
20072026
Each tall tick is one HN user's first recommendation. A short tick is the same user again. Click a tick to jump to the comment.
Deftun MiniDX4B Wireless Bluetooth Collector
Amazon's catalog no longer lists this product (checked 2026-11-02). The name comes from the link HN users posted.
The overwhelming "defaultness" of the whole thing makes me think these were actually intended as conversion adapters or something else that wasn't purpose-built for pump skimming. The complete lack of code protection (setting it is literally a single checkbox in the programming utility --- and almost all commercial products with an MCU will have this protection enabled), leaving the markings on the chips (I've seen more legal devices with them scrubbed off), and default password unchanged are the most noticeable.
Googling "bluetooth magnetic card reader" also yields quite a few results like this one:
https://www.amazon.com/Deftun-MiniDX4B-Wireless-Bluetooth-Co...