When using portable solar panels, you need to align them to the sun for maximum efficiency. A simple easy way is to stick this solar dial to the panel. Align the sun in the center of the dot and you know your panels are aligned direct with the sun.
4 Different Versions:
Goal Zero Clip
Bioenno Power Clip
Generic Stikem Mini
Goal Zero and Bioenno will clip to frame. Generic will stick with double sided or velcro.