This all-purpose penlight features an incandescent clip activated light. This is the perfect medical industry and nurses promotional product! Great for eye exams, clipping to clipboards, and unobtrusively lighting a room. Customize it by adding a full color logo to help promote your brand name, and choose from many available colors. Runs on 2 non-replaceable AAA Batteries. Battery lasts for 5+ hours of active use. This product is FDA registered.