Fenix TK41 is a high-intensity multifunctional flashlight powered by AA batteries. The dual switch system in the side allows for fast selection between four different brightness levels and two various flashing functions. Its unique design makes TK41 extremely compact and lightweight. Featuring a max 800 lumens output and an amazing ten day-plus ultra long runtime, the TK41 will unconditionally meet your illuminating needs. It is perfect as your dependable outdoor partner for searching, caving or as a spare light for your car, etc.