Multifunction Ink Cartridge Tester for hp ink cartridges for Hp 301 cartridge tester Test: for HP61/301/122/802/704/46/678 Specification: 1, for hp 301 series circuit tester. 2, test ink cartridge odels hp 61 301 122 802 46 704 678 . 3, high accuracy , close to 100% rate. 4,Light & small size. Easy to take and use. 5, warranty :12 month 6, read the old and new vision.