This keychain laser has three modes: push the front button for a red laser, or click the rear button once for a white flashlight, or a second time for a blue flashlight.
While a white flashlight is always handy to have, the blue flashlight will charge up our Kryptonite
, or allow you to write messages on our Kryptonite sheet
. You can see in the image below that it makes the fluorescent dyes in white paper glow.
The laser works great for our Laser Voice Communicator and Free-Space Laser Data Transmitter projects.
Batteries included (first remove the protective paper disk between the batteries and the laser).