Find Angle for Solar Panels - The solar angle guide helps you determine the optimal angle for your solar panels to maximize energy output and efficiency. By using the solar angle guide, you can that your solar panels are operating at maximum efficiency, saving you time and helping a lot for your outdoor time. Easy to use - It's only necessary to adjust the solar panel so that the shadow of the black dot is in the center of the scale plate, you'll get the tilt angle for your solar panels. The closer the angle of illumination is to 90°,the higher solar energy intake you get and the shorter solar charging time. Compatible with Different Panel Types - With a clip on the back, the Solar angle guide is suitable for use with a variety of solar panel types, including fixed, adjustable, and portable panels. It is also and easy to carry with you wherever you go. and portable - Made from high-quality ABS and acrylic materials, the solar angle guide is sturdy and long-lasting, which can withstand harsh weather conditions. Colour:White Material:ABS Package Contents: 2 x Solar Angle Guide 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.