Brief description: Meterial: Stainless steel + Acrylic Light source: LED lights * 2 piece Batteries: AAAA (or LR1) Alkaline batteries * 2 pieces Refill size: 70*2.3mm Ink Color: Black (standard) Important Tips: 1.Insert the battery with correct polarity to avoid any possibilities of insecurity. 2. Remove the battery if you don't use it for a long time. Features / Advantages: 1. Stainless steel barrel - a little heavy feel / wear-resisting,Can be used for many times. 2. Use LR1 battery - Continuous discharge time is longer. 3. Spotlight effect - The light forms a perfect circle around the pen tip. How to replace the battery? 1. Rotate counterclockwise until open 2. Take out the old batteries 3. Put the new battery into the pen ( Please note that the negative terminal of the battery is downward. ) 4. Rotate this piece clockwise until it is completely merged Read more How to replace the battery? 1. Pull out the pen part from the metal barrel directly by hand.No screw. 2. Twist the metal tube in anticlockwise to make the black part available for twisting. Then twist the tip of black part in anticlockwise by hand (screwdriver if possible) to take out the old one and replace the new one. 3. Insert the tip of pen into the metal barrel. Read more lighting How to use the ballpoint pen function? When you twist the pen tip,the ballpoint pen will be out. When you twist it in the opposite direction,the ballpoint pen will be retracts. How to use it? How to use the lighting function? When you use it at night or in low light,You can press the button,The LED will light up. When you don't need lights anymore, You just press the button, The lights will be off. Read more Introduction: Everyone wake up at night thinking about profound ideas, dream journal ,but don't want to turn on the light to write it without disturbance ? Is it a burden for some who need to write it in dimly lighted environments for everyone ? Need some notes to avoid forgetting things tomorrow ? Need some helps some one who need night shifts? Well, this is the perfect Writing instruments. Designed for anyone who needs to write or take notes in dark or low light environments. Add some helpful fun to enjoy your writing time! A thoughtful gifts for Students, Doctors, Nurses, Bookworm, Writer ,Server, Directors, Choreographers, Pilots, Flight screws, Police for Birthdays ,Christmas ,New Year and so on.