R1900 continuous ink supply system 1.With chips, sensor 2.High quality 3.Install simply ... simply, use conveniently.5. Beautiful outside. R1900 continual ink supply system can use for:Printer model: R1900Cartridge model: T0870, T0871, T0872 ... , T0873, T0874, T0877, T0878, T0879 . ink system for R1900/R256/R230/R270