The cover color of notebook will be changed after the temperature reaches the point for color change. The temperature of color changing for notebook is about 25 or 29 ℃. so it will change color when you put your hands on the cover for a while.
Interior: 80 sheets lined pages & inner pocket
Packaging: OPP Bag
Material Special PU
Dimension 21.1 x 13.5cm
Color(s) Red with Yellow, Black with Blue, Black with Orange