Take out the memory card. When the ice coffin is being transported back and forth, the memory card sometimes falls off, and the music cannot be played after it falls off. Ice coffin is also known as crystal coffin and ice coffin. Different from solid wood coffins, this kind of coffin is made of stainless steel or other metal materials. The machine includes an electrical system and a refrigeration system, and the refrigeration effect can be achieved when electricity is supplied.