1、Aluminium Alloy: This LED flashlight adopts aluminium alloy material, which ensures strong impact resistance and weatherproof performance. 2、Three Modes: This LED flashlight supports three adjustable modes, including high light, low light, and strobe, meeting your different needs. 3、Wide Application: This LED flashlight is widely used in outdoor hiking, camping, self defense, teaching, adventure, night fishing, emergency, etc. 4、USB Charging: This LED flashlight adopts USB charging in low voltage, with the battery indicator, providing more convenience. 5、Hidden Knife: This LED flashlight is equipped with a hidden knife that can help your easily cut the ropes, twigs, twine, etc. 1 x LED Flashlight (Battery Not Included) 1 x USB Cable   Item Type: LED FlashlightMaterial: Aluminium AlloyProduct Size: Normal Size Approx. 195 x 45mm / 7.68 x 1.77in. Stretching Size Approx. 209.5 x 45mm / 8.25 x 1.77in ( Manual Measurement, Slight Error May Exist )Power Supply Battery: 3 x AAA Batteries (Battery Not Included) or 1 x 26650 Lithium Battery (Battery Not Included)Light Source: White LightLight Beads Type: P50Mode: High Light, Low Light, StrobeCharging Method: USBSuitable For: Hiking, Camping, Self Defense, Teaching, Adventure, Night Fishing, EmergencyWeight: Approx. 320g / 11.29oz