... cartridge sensor,use with original cartridge,use CISS continuously) decrease the stock risk of CISS seller ), avoid the undected chip problem ... because of updated Epson printer, decrease the stock risk of CISS seller.3. Save money, protect environment.4. Install simply, ... ink supply system Can use for:Printer model: C79/C90/C92/CX3900/CX4900/CX7300/CX5500Cartridge model: T0731, T0732, T0733, T0734 ...