Personalize your heart out by sliding the tiles in and out. Black shell box with 100 pcs of Letters, Numbers & Symbols and built-in letter storage on the back of the box for 180 characters and stoppers to prevent letters easily falling out. 100 characters included Material: ABS plastic/LED Power: 6 x AAA batteries (not included) or micro USB port (lead included) Mount: Wall/ table Product Dimension: 20 x 15 x 4.5 cm / 7.9 x 5.9 x 1.8 in Packaging Dimension: 21.5 x 16 x 5.2 cm / 8.5 x 6.3 x 2.0 in