120x100 cm holds like a magnet. it does not damage the surface. it is used with the printed surface at the bottom. there are instructions for use on the box. when used upside down, the lines are erased. can be written and erased. no damp cloth or wet wipes are used. whiteboard markers are used. dry erase should be done. no disassembly should be done. maximum 10 pieces of this product can be ordered. swordslife reserves the right to cancel orders over 10 units. more than 100 stocks are available to be sold at the campaign price. the seller determines the sale price of the product you have examined. Improved version for clearer understanding and better search visibility. Suitable for users seeking detailed and reliable product information.