This Compco slide binder comes in its original box and can hold up to 140 slides. It is compatible with Universal and Plus brands and can handle slide sizes from 2"x2" up to 3-1/4"x4". The binder features slide retaining clips to keep your slides secure during projection. This unit is designed for use with slide projectors and runs on 120V power. Made in the United States, this slide binder is a reliable choice for organizing your slide collection.