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The bootloader is already installed. Clock Speed: 16MHz. USB chip: CH340G. The USB to serial chip used is a CH340G Drivers are required for Windows and Mac OSX. Drivers for the chip are freely available online.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.