Dimension: 7.8 x 7.5 x 4.2 cmColor: random color1) Pull out the back Cover， insert into 2 AA batteries ( not included ) 2) Automatic toggle button， insert into a pencil then it can work normally3) Take out the pencil then you can write4) Pull out the peel box， clean the litter， and also please always do itNote please: This product includes small gadgets which can't be used by child under 3 years old.1 x Pencil sharpener