Review on REXQualis Nano V3.0 Arduino Boards Bundle: 3pcs CH340/ATmega328P 🔌 Nano Boards with USB Cable - Compatible with Arduino Nano V3.0 by David Gonzalez

I bought a real Arduino Nano and three of these items. The real Nano works reliably with avrdude. All three of these REXQualis Nanos are getting "Programmer Not Responding" errors. Linux recognizes the ch341 UART and creates a ttyUSB0 device node, but the board doesn't respond when I try to talk to it. So it's unlikely to be "100% compatible" with the original Nano. Unfortunately, since there is no "Get Product Support" button to ask the seller how to use this item, I had to return it.