Turn the light on and off by double-clicking the power button. Once the light is on, use a single click to cycle through the strobe light and SOS options.****************************************************************************** Charging with solar power takes longer, so it's recommended to use a charging cable for a faster charge. This 20,000 mAh portable external solar power bank is perfect for charging phones, tablets, and other devices. A. Charge with charging cable or solar power B. Contains industry-leading high-density lithium polymer cells that maintain a compact size and weight while providing long-lasting battery life. C. The powerful configuration quickly charges devices, saving you time. D.【Dual USB Outport and Powerful LED Light】Charge two smartphones simultaneously or a tablet at full speed with the dual USB ports. The power bank also features two LED lights that can be used as a flashlight. Five pilot indicators show the battery charger's status, with a green light when charging by solar and a blue light when charging via USB