Upgrade design with 1.5mm narrow side and 77mm width, increase effective printing area by 13%, providing better reading experience. Original printer head with ceramic material, offer intelligent temperature control and HD printing image with high resolution. No cartridge and ink are needed. Enjoy long life span which can print up to 7000 rolls of paper. Low noise printing with built-in upgrade structure, no worry about disturbing others even using in public areas. ">