Amazon.com: Geekstory for ATMEL 51 AVR USB ISP ASP Microcontroller Programmer Downloader with Cable + 10Pin to 6Pin Adapter Board for Ender 3 or Ender 3 Pro : Electronics
USB AVR ISP (In-System-Programmer)
How to make an AVR Programmer out of a Pro Mini – Part 1: ISP/ICSP | Pro Mini Micros