Best Seller in fluorescents! New technology Ultra Violet Light Emitting Diode in a super light-weight sturdy mini case. Highly directional and good for thousands of uses. Operates on three button cell batteriesKids like learning when they can play with a ball to learn! These colorful 24-inch inflatable educational balls are an excellent way for children to build skills. and two sets of batteries are included! Illuminates highly Fluorescent objects from across a room. This light is based on a new technology that allows an ultra violet light source to be packed into an ultra small solid state package with amazing power and efficiency. Side mounted switch turns light on with one click and then off with another click. Includes, chain, lanyard, key ring fastener, and belt hook. High Tech at a Low Price. 396 nanometers. Information on how to place your order by fax or by telephone. Additional information on blacklight uses. Product number ULTRA9800