The efficiency of single crystal solar cells is up to 20%.Outdoor solar panels can effectively convert sunlight into electricity.Keeping the air can help you eliminate the smell of pets, etc.Equipped with a standard USB voltage regulator to maintain 5 ~ 6V output. Laminated epoxy resin surface, IP65 waterproof, improves durability.Suitable for greenhouses, pet houses, tree houses and RVs, etc. maintaining comfortable temperature levels.Precautions:1. Do not scratch the surface of the solar panel with sharp objects.2. When charging the charger with solar energy, put the solar panel up in direct sunlight to ensure the best charging effect.3. Do not put the charger in outdoor solar power for emergency charging in rainy days, so as not to cause short circuit.(The front of the solar panel is not afraid of rain (Please note that water does not enter the USB and DC ports).Power: 10WUSB regulated output: 5V 1000masize:420x190x2.5mmMaterial:Monocrystalline silicon+ABScolour:blackPackage Contents:1 * solar panel1 * fan4 * suction cup1 * cigarette lighter charger1 * battery clipOnly the above package content, other products are not included.Note: Light shooting 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.