The Sharper Image refill cartridges for smartphone photo printers are designed for high-quality color printing with a resolution of 200x200 DPI. These thermal cartridges are portable and easy to use, making it convenient for on-the-go printing. With a 8-bit color depth and a 1 MB memory, these cartridges provide clear and detailed images for A0 size printing. The CCD image sensor ensures sharp and vibrant photos every time. Ideal for digital photo printers, these cartridges are a reliable option for smartphone users looking to print professional-quality photos.