Illuminated Apparel laser pen The Illuminated Laser Pen is an accessory for the T-shirts of Illuminated Apparel. The pen looks like an ordinary pen, but has a laser light. With the laser light of the Laser Pen you can remotely write or draw on the T-shirts of Illuminated Apparel. The text or drawings remain clearly visible for 5-10 minutes before the glow begins to fade. The class 2 laser complies with the 21CFR standard and operates at a frequency of 405nm ±10 with a max output of Specifications: Length: 15 cm Weight: 25 grams Colour: black Batteries: 2 x 1.5V AAA, not included