Adjustable zoom and focus: With USB flashlights, the diameter of the light is adjusted from the top and by turning clockwise or counterclockwise. Extremely bright: The flashlight uses a high-efficiency LED chip with a beautiful PCB design and a galvanized aluminum plate with a maximum of 500 lumens. The light beam can be projected up to 200m. 3 modes adjustable. Simply turn this flashlight inwards or outwards for a beacon or spotlight. It has only 4 lighting modes (High, Low, Strobe, COB), effectively reducing the difficulty of switching between 5 modes. USB Rechargeable Flashlight: The USB LED flashlight is equipped with a rechargeable 18650 battery and can can be used with a USB cable or with a power adapter from a laptop, car charger, laptop, power bank, etc. As you adjust, the light will either get smaller and more focused, or bigger and less focused, but it will illuminate a wider area. Waterproof and portable: Waterproof to IPX4 standard and designed for use in heavy rain. Even without the USB port cover, it can also be waterproof. Its durable aluminum housing and its elegant shape make everyday life easier Wear. Perfect for camping, hiking, fishing, running, walking the dog, power outages, emergencies, targeted research and general home use.