led promo pen,LED LIGHT PEN(Light Pen, Ball pen) led promo pen1.Material:ABS + metal pipe + pp+ metal 2.Color:metal luster 3.technology:electroplate 4.Functions:Ball pen + LED flexible book light 5.Battery:AG3*3 6.LED:3,000-4,000MCD 7.Size:13.5*0.9cm 8.weight:25.4g led promo pen