The Millite LED Finger Light is designed to be worn on either index finger and easily operated with your thumb. Great for applications where directed light is needed but both hands need to be free such as operating weapons, flying at night or working in tight spaces. The light features 3 layers of durable molded plastic, rubber coating for water resistance and shock resistance, an adjustable velcro strap, dual push button switches, an electronic safety guard which prevents accidental operation, is O-ring sealed and is soldier-proof. Additionally, the high and low modes are easily selected by holding the on/off switch and 3 x LR44 batteries are included.