The Nitecore Thumb Leo is a bright, lightweight, versatile key chain. It packs a bright 45 lumen white output, but weighs less than 1 oz.! Optimized for law enforcement officers, the THUMB LEO is also equipped with an ultraviolet black light, great for currency verification, fluid detection, scorpion hunting and more! It also includes a red & blue alternating emergency signal, all at the touch of your hand. The unique tiltable head offers over 120 degree adjustable angles and it includes a clip you can use to attach the light to a cap, bag strap, or pocket and direct the light exactly where you need it the most. With these features combined with the built-in USB charger and rechargeable Li-ion battery, the light makes a great accessory for anyone in law enforcement, security, investigation and more!