[Improve Energy] Solar angle guide helps you find the best angle for your solar energy system (perpendicular to the sun) no matter which latitude you are. You can catch every ray of light and concentrate the sun's rays onto the surface of your solar panel. Gives you a way to maximize solar exposure and shorter solar charging time. [Simple to Use] Get Your Angles Right: Thanks to its transparent shell, you can line up the sun's shadow to the center of the Solar Angle Guide. This ensures you're perpendicular to the sun's strongest rays. [Premium Quality] Since it needs exposed to the sun for a long time, our solar tracker tool uses UV-resistant and high-transparency PC and ABS materials, waterproof, durable and high temperatures resistant, prolong the service life. [Widely Application] You can use it on any brand of foldable portable solar panels or solar mounting bracket. And it easy to install and remove, you only need one solar alignment tool to adjust the angle for every solar panels you have. [Notice] Make sure you install on the appropriate location, do NOT block any cell of the solar panels which will reduce the power efficiency Colour:White Material:ABS Package Contents: 2 x Solar Angle Guide for Solar Panel Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.