Tamiya Pulley Unit Set Educational Series

This is a Wheel System Set for Different Designs.
    It's from Tamiya for extremely skilled model builders.

FEATURES:
Pulley-block set is created to attach to a selected model set such as a
    jumping dophin, an elevator, a moving canine, alligator, or revolving
    bird cage.
Contains white, black, and gray plastic parts attached to sprues.
Other parts consist of an electrical motor, belt guides, skinny belts,
    circular wheels, rivets, a base, and motor holder.
Battery operated.
Small phillips screws for strong construction.
Structure of wheel is kept easy for maintenance purposes like
    changing the belt, if needed.
Pulley rotates easily, enabling a pet to wag his tail, an alligator
    to open his mouth, or a dolphin to "leap" into the water, amongst
    other chosen motions.
Designed for fairly little and easy models.
Reverse rotation of wheel is possible.
Pictorial instructions included.

INCLUDES:
One Pulley-block System Set

REQUIRES:
Assembly
Battery
Small Phillips Screwdriver
Designing Knife
Sprue Cutters
Long Nose Pliers

SPECS:
Base: Length: 4-3/4" (12.3cm)
Width: from 1/2" to 1" (1.5cm to 2.5cm)
Height: 1/4" (7mm)

COMMENTS:
Keep out of reach of little kids. Contains little parts.
Instructions and box language written in Japanese and English.