APPLICABLEPRINTERS QE-138 resetter is suitable for Maintenance tankwhich is applicablefor New printer model 7700/9700/7710/9710INSTRUCTION 1.Usally weneed to clean the printing head. This product (7700 maintenance tank)have sponge in it which can absorb the ink(the inkis volatile). 2.The printer will alert user when tank needs to be changed. (replaces C12C890501/C12C890502) 3.When the tankis fullwith waste ink, we suggest you canuse syringe to suck out the ink. If you pour-out the waste ink directly,the maintenace tank is easy to get dirty everywhere.