The form of building model is derived. Turn the middle three layers into movable gears. An opening is left in the middle of the floor, and then the year, month and day can be displayed. The design with a pencil sharpener on the top can sharpen pencils.

Product parameters:

Size: 42x12 5X12mm

Weight: About 400g

Function: monitor temperature and humidity and display date

Charging mode: type-C

Shell material: Poly stone, metal, acrylic, etc