This is a Battery Operated Hobby Paint Shaker Machine by Robart.
Shakes paint better than by hand!
Operates at 5000 shakes per minute.
Perfectly blends paints for smooth application with brush a or spray
For use with 1/4oz to 1oz paint bottles.
A rubber strap holds the bottle in place.
Foam pads on the bottom protect surfaces.
One Paint Shaker
4 D Batteries
– If you need more information, use these Robart resources –