Please Note Handheld inkjet cartridges are only available for specialized Handheld Inkjet printer PT2000SE. If you would like to purchase this Ink Cartridge, please purchase a handheld Inkjet printer to use. Original handheld inkjet printer link:https://www.amazon.com/dp/B08F9KY35C Ink Cartridge Usage Precautions 1.When Handheld Inkjet Printer Starting and Printing, Do not Pull Out and Insert the Ink Cartridge. Stop Printing, Please Cover the Protection Cover. Otherwise will cause ink cartridge or nozzle drive plate damaged. 2.As It is a fast drying Ink cartridge,when the printing is suspended, please cover the protective cover in time to prevent the nozzle from being air-dried and blocked. The following situations will occur in the process of using ink cartridge, which are all normal phenomena: (1).After the pause to print, it may be a blurry opening. Solution:continuous printing (2).Broken lines may appear when printing. Solution:Gently wipe the spray head up and down with a clean, soft tissue. 3.The Ink cartridge is consumable and cannot be returned or replaced without warranty. It is recommended that the cartridge is used up within half a year after electrification.