The fischertechnik LED Set is just the right solution for more light! The construction sets can now be upgraded even further with more luster and additional light effects. The LED set contains two Rainbow LEDs that flash in different colors and frequencies, together with two white LEDs and a battery holder.
 

Includes: 2x Rainbow LEDs, 2x white LEDs, battery holder for 9V block battery (battery not included)
 

Ideal additions: Accu Set, Power Set