The moisture meter can quickly measure the moisture content of the grain. 1. High conversion rate: Solar charging panels are environmentally friendly and energy efficient, with a high conversion rate, 20% higher than ordinary solar panels. 2. 3. Flexible and portable: flexible solar panels are not at risk of shattering, durable, waterproof (the interface should not be directly submerged in water), lightweight and easy to carry. 4. Safe to use: The 20W 12V solar panel uses short circuit protection and overcurrent protection to keep you and your equipment safe. 5. Specification: Item Type: Solar Charging Panel Material: ABS Power: 20W Voltage: 5V, 12V Output parameters of USB port: 5V 2A Product Size: Approx. 215x185x1mm / 8,5x7,3x0,04 inch Color: as shown in the pictures Weight: Approx. 330g / 11,6 oz Application: charging various equipment, emergency lights, advertising lights, traffic lights, fans, solar water pumps, motorcycles, boats, etc. List of packages: 1 x Clip Line 1 x car plug; 2 x Ring Buckle 1 x Solar Panel 4 x Suction Cup 1. With car plug and clip, you can charge 12V.2.