This 12V solar car charger has everything you need to charge deep cell batteries and smartphones with built-in USB ports. This panel was installed in a patio and could be charged with a 60,000mAh power plant backup battery using the adapters provided. connects to batteries with small alligator clips. This panel can reach a high output of about 40+W even in cloudy weather. The foldable legs are attached with a thin wear-resistant fabric and return to the back of the panel with Velcro to reduce the amount of items to manage when traveling or outdoors. .The eyelet holes allow me to place this panel on the roof of our van to keep it out of reach of campers with sticky hands or to avoid it hitting the panel and disconnecting cables. The arm is comfortable and has double stitching at the base of the panel.