Suit for Epson printers:S22/SX125/SX425/SX420/BX305F.... Suit for cartridges: 1281/1282/1283/1284 Suit for Epson printers:S22/SX125/SX425/SX420/BX305F....Suit for cartridges: 1281/1282/1283/1284Printer interface circuit directly in the cartridgethe patent number: 201120022201.3 S22 Auto reset chip