First use:Before first use, the solar panels are directly exposed to sunlight for at least 12 hours (daytime) to charge the battery for sufficient charge. 4 Lighting Mode: adjustable 4 mode brightness(high brightness, low light, fast flash, slow flash)to meet your different lighting needs, high quality LED lamp beads, can provide even, warm light, no dark spots. 2 charging methods: Built-in solar panel, can be directly charged by sunshine, or can be charged with USB port, 2000mAH big-capacity battery solar panel can charging the phone. Use Widely and Waterproof: IP55 waterproof, waterproof and dustproof, good sealing,small size, easy to carry, can be placed in the hands, hanging in cars, trees, tents and any you want to illuminate. Easy to install and Nice warranty: You only take out the lamp from box, just install it wherever you want, 30days encounter any quality problems, please contact us, we can deliver for you.