Atarashii Gakko no Leaders - Youth's Light Used once at a live performance. The batteries are left in, so it will light up if they still have power. Please note that if the batteries are dead, you will need two coin batteries. * Requires 2 CR1620 coin batteries Press the switch to turn ON, and long-press to turn OFF. While ON, each press of the switch cycles through: constant light → flashing → OFF. BLUE → BLUE flashing → OFF