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Solder and enjoy this mesmerizing chameleon that lights up in the dark. This unique gadget features a two-tone PCB that transitions from blue to green. The 'eye' of the Gent is a phototransistor that registers light. If it doesn't 'see' any light, the LEDs will gracefully show their colors. Educational and fun! power supply: 3 V CR2032 battery (not incl.)