Glovion Led Light Pen,Penlight for Nighttime Writing -Blue- Pack of 3 Pens ECONOMICAL PACKAGE PEN LIGHT: Each Pack include 3 x BLUE Light Pens with extra spare refills for recycle using. The ink of Cartridge is black . HANDY LIGHT UP PENS: Easy to use, just one click the top button to turn the light ON and OFF , LED Penlight is powered by 3X AG 13 (LR44) cell battery (Installed and Replaceable) :Twist the light barrel to get the pen tip in and out. NIGHT WRITER WITHOUT DISTURBING:As a lighted Pen Writing instrument, suitable for who need illumination in low light environments -Write notes, thoughts or reminder without disturbance in the dark at Theater, Restaurant ,Bars , Auditorium, Concert ,Hospital , Dormitory,Bedroom and more . VERSATILE PENLIGHT : Not only you can write it in the dark, but you can read what you write. Idea for your handbag or keep on you because it backs up as a small flashlight for emergencies. BUYING WITH CONFIDENCE: One year replacement for defective units ,30 days no-hassle refund & replacement ,our customer service team will provide you friendly and proactive customer service with no-hassle lifetime guarantee!