R400 CD player, a more suitable entry-level product for beginners. The body is made of dual materials, which gives it a strong texture. The design of the appearance follows the concept of functional requirements, and attempts to solve problems through design. The design of a sunken charging compartment and wire groove can effectively avoid bending of the charging head. The R400 offers two types of connectivity: wireless and wired, which can meet daily needs and provide more young people with the opportunity to access physical music.