Size: approximately 15X2X2 CM, Weight:20 g The ink of refill is black Low lighting in clubs and bars can be a burden on servers and customers alike.So add some helpful fun to the mix with one of these light up LED pens Write Easily in Dark Places With Light Up Pens White color LED,powered by cell battery ( installed and included) Great to Use in Dark Auditoriums, Meetings, Bars and so on