The moisture meter can quickly measure the moisture content of the grain. 1. Monocrystalline Silicon Material: This 50W solar panel is made of high efficiency monocrystalline silicon cells with high conversion rate and high output efficiency. 2. Environmental protection and energy saving: This portable solar panel kit uses green energy solar energy, which can contribute to environmental protection. 3. Great performance: This monocrystalline solar panel is lightweight, convenient to carry, easy to install, with high stability and high durability. 4. What you get: one 50W solar panel, one 30A controller, one connecting cord, four suction cups, one car charging cable and one output terminal. 5. Multiple uses: This solar panel charger can adapt to various complex adverse weather conditions, suitable for RV sea boats, mountaineering, hiking, camping, hiking, etc. Specification: Item Type: Solar Panel Kit Material: Monocrystalline Silicon Weight: ok. 602 g/21,2 oz Solar Panel Power: 50W Controller Voltage: 12 V 24 V Controller Current: 30A List of packages: 1 x Solar Panel 1 x Controller 1 x Connection Cable 4 x Suction cups 1 x specification 1 x Car Charging Cable 1 x Output Clip Note: Lack of energy storage function.