Long press the power button 2-3 seconds to the maximum brightness. Switch the modes according to your different needs. This USB rechargeable flashlight is powered by a 500mAh capacity built-in rechargeable battery, micro USB to USB charging cable included. It usually takes about 2 hours to be fully charged. The strong magnet base and rotatable handle allows you release your hands during the work. The magnet design allows the lamp to attach to any metal, and 180foldable handle allows the lamp to be positioned at different angles or hung in certain places. The portable flashlight has a carabiner that can be easily attached to key ring or bags, and it is water and impact resistant. Alternatively, it's also a good bottle opener. You can use it in a variety of scenarios, such as camping, walking the dog, looking for things, repairing. LUTITASD