A. ciss with a combo chip, the chip has the function as below.1)There is a button and swith on the chip.2) the button is used to reset the chip 3)The swith is designed for your choice to use together this ciss with one original cartridge or without. swith one side is use a original cartridge, another side is don't use a original cartridge.4)With this chip, you will use forever,no matter how original changes,no need change ink cartridge or chip any more.B. it is more cheap that 9 point new chip.C. We can offer ciss cartridge with combo chip models ad below:T0691-T0694,T0711-T0714T0731-T0734T0921-T0924T0841-T0844T0731,T0731-T0734T0691,T0691-T0694T0711,T0711-T0714T0781-T0786T0801-T0806T0821-T0826T0851-T0856T0791-T0796T0811-T0816
