Just tap the cup on the table or hard surface, the cup will flash time:flash ten seconds continuously by each tapping material:acrylic capacity:50ml Battery:2pcs AG3 Battery Packing: Ea/Poly bag/100p
FLASHING SPECIAL SOUND HALLOWEEN W/2pcs Red LED Use 2pcs AG13 Battery Blinking 12 seconds and autostop Ea/Blister Card, 100pcs/inner/400pcs/ctn/3.9`/14KGS
FLASHING SPECIAL SOUND HALLOWEEN W/2pcs Red LED Use 2pcs AG13 Battery Blinking 12 seconds and autostop Ea/Blister Card, 100pcs/inner/400pcs/ctn/3.9`/14KGS
FLASHING SPECIAL SOUND HALLOWEEN W/2pcs Red LED Use 2pcs AG13 Battery Blinking 12 seconds and autostop Ea/Blister Card, 100pcs/inner/400pcs/ctn/3.9`/14KGS