While many pens have the light up feature, do any of them really work? Our Ultimate Lighted Pen shines where others fade! This high tech pen has not 1 but 2 powerful LED's that combine to produce an impressive beam of light that will knock your socks off. Whether you're illuminating a restaurant check or finding your way around after the power goes out, this pen is up to the challenge. Writes in black. Batteries: 2 Pieces AG-3 (replaceable) included and installed.