Red laser pointer & ballpoint pen ,flash memory function flash memory pen with red laser pointerCapacity range:1GB/2GB/4GB/8GB/16GB.......... One laser pointer & ballpoint pen function. No driver required Portable date storage and exchange, can be written and erased 1,000,000 times Output power:(class II<1mW or class III<5mW) Wave length:630-670nm Battery: 3pcs LR44 Product Size :15(dia)*150mm