Newton cradle glow in the dark perpetual motion pendulum

This Newton Cradle pendulum features a unique lighting effect making for a beautiful addiction to your desk or office space. 

Specification:
Product weight: small size 177g, large size 307g
Packing size:
small 12.5*9.5*12.5cm/4.92*3.74*4.92"
Large 15.5*12*15.5cm/6.1*4.72*6.1"
Light-emitting mode: switch control
Luminous color: RGB
Application: indoor decorations, gifts, educational toys
Power supply: uses 4 ordinary AA batteries (without batteries)