The moisture meter can quickly measure the moisture content of the grain. 1. 2. Solar Battery Charger: Solar panels convert sunlight into electricity that is energy-efficient, environmentally friendly, and pollution-free. 3. High conversion rate: Made of monocrystalline silicon and ETFE material, solar panels offer higher conversion efficiency and lower losses compared to polycrystalline silicon. 4. Comprehensive protection: The solar panel can prevent battery overcharging, surges, discharge, short circuits, with reverse polarity protection and water resistance. 5. Automatic charging: The solar panel can automatically charge during the day and automatically turn off at night without consuming battery power, increasing charging efficiency by 20%-30%. Specification: Item Type: Solar Battery Charger Material: Monocrystalline Silicon, ETFE Power: 30W Output voltage: DC port: 12V direct current USB port: 5 V DC TYPE-C port: DC 5 V Solar Panel Size (L. x W ): ok . 420 x 270mm / 16.5 x 10.6 inches Waterproof: IP67 List of packages: 1 x Solar Battery Charger 1 x Battery Connection Cable 1 x Car Charger Cable 4 x Suction cup 1 x Manual Note: Manual measurement, size may contain errors