This refers to the fact that this product does not contain those auxiliary tools that are used to perform a certain task or that allow a complementary operation of a machine.

When we talk, for example, about computers, accessories are those hardware elements that allow for additional functions like remote controls, cameras, memory, etc.

Accessories are secondary elements or objects and are used to complement something else, therefore, their use is entirely optional. The product not having accessories does not affect its performance at all.