About this item Long Lifespan & Bright BeamClip base light is made of ABS, powered by 2 CR2032 push button batteries, 1 high brightness LED, long lasting of life and light beam Simple and useful Just clip on the hat, simple and useful, strong clips to stay in place, easy to remove if necessary. Multifunctional for various uses, such as night fishing, reading, home appliance maintenance, etc. Portable and lightweightSize: approx. 4*2.3*3cm/1.6*0.9*1.2in Mini in size and compact in appearance, portable, lightweight and easy to carry Clip-on design The clip-on reading lamp is designed in a clip-on fashion. You can usually fix it on the sides of the glasses or the brim of the hat for ultimate convenience and relax your hands. Free adjustment toThe lamp can be rotated 360 degrees and you can adjust its lighting angles freely. There is a humanized convex light barrier on the side of the beads which blocks light and affects your eyes