This 4.9‘’-long flashlight provides up to 1600 lumens and 450 meters beam distance. It is a modern engineering feat with dozens of features all accessed by a single tactical tail switch. 5 brightness settings, 3 tactical settings and 3 for emergencies & signaling. When in trouble, you can use SOS, beacon or strobe features. Lockout function can prevent accidental activation. Countdown feature helps to turn off 18650L automatically. The included 2600mAh 18650 battery has a built-in USB port for a direct charge. Suitable for military use, policing, security, exploring, emergency lighting, camping, hunting, etc.