Decoder for HP Z3100

v1. Open the both two sides cover of printer.2. It has chip data line at the bottom of cartridge. Take out the pin; insert into the socket after PCB of HP Z3100 decoder.3. One printer should be installed two decoders.4. After install decoder, it does not need to install chip in cartridge. It just need install refill cartridge and refill corresponding ink.5. After open printer, please test to printing.