How do you create the world's best high performance light up yo-yo? By combining the popular Duncan FH Zero Pulse design with Pulse's LED light technology. FH Zero with Pulse Technology features a wide flared shape, recessed response system and LED light technology that blinks, pulses and changes colors as well as patterns as it spins. Attach the included LED light up counterweight to perform extreme in the dark counterweight tricks. Button cell battery, included. WARNING: CHOKING HAZARD - Small parts. Not for children under 3 years. For boy or girl ages 8 and up. Made in China.