1), Permanent chip2), this is only 1 set chip (4 color :bk c m y )3), ciss chip , cartridge chip4) cartridgemodel : for hp 711 CHIP3) printer model :forHPDesignjet T120forHP Designjet T520printer1.This kind of chip can not indicate ink level. You can install this chip on Refillable ink cartridge or CIS system.2.Attention: For refillable ink cartridge users: Please make sure the ink cartrdge always have ink in it, that means users have to add ink before ink cartridge out of ink. So we suggest users check ink level one or two times every half an month according to your printing job quantities.3.The chip\'s life will be over if ink cartridge out of ink.