1) Compatible with:
CANON IP3600/IP4600/MP540/620/630/980 (Europe, Austrilia, New Zealand)
--PGI-520BK, CLI-521 KCMY
CANON IP3600/IP4600/MP620/980 (America)
--PGI-220BK, CLI-221 KCMY
CANON IP3600/IP4600/MP540/620/630/980 (Japan)
--PGI-320BK, CLI-321 KCMY
CANON IP3680/IP4680/MP638 (China and other Aisan countries)
--PGI-820BK, CLI-821 KCMY
2) Auto reset chip, which can be used on CISS and refill carts;
3) Save your cost and time;