Description: 1) Economy: by use of AAA, change easily and buy easily; while old LED light penis only by use of button cells 2) High capacity: the capacity of AAA is much higher than button cells,one pieceAAA can last 20 hours.3) Extra light: by use 2 extra white on the tip of pen; while old LED is only byuse of color LED and in the middle of pen which can not be used for lighting4) Environment protect: both battery and pen core can be changed; while oldLED light pen is disposal and one-time use.5) Easy to be carrying: light as normal pen with clip, can put into pocket with easy6) By use of high capacity ball pen refillProduct Size: 139X18.5X14.5 MM WEIGHT 16GPacking: PP BAG or white box(color box)Carton Dimension(L*W*H)(cm): 30.5X17X42.5 CM 1PC/PP BAG,50PCS/INNER,500PCS/CTN.Carton Gross Weight(kg): 8.5/7.5kg