The moisture meter can quickly measure the moisture content of the grain. 1. [Efficient] External solar panels can effectively convert sunlight into electricity, which is efficient and practical. 2. [Energy Saving] Solar exhaust fan uses clean energy, saves energy and has a long service life. 3. [Scent Removal] This solar panel exhaust fan can help eliminate pet odors, tobacco, etc., keeping the air clean. 4. [Portable] Solar powered air extractor is lightweight, easy to carry, solar powered and suitable for outdoor use. 5. [Application] Solar panel fan is suitable for kitchen, greenhouse, pet house, chicken coop, tree house and motorhome etc. Specification: Item Type: Solar Panel Exhaust Fan Material: monocrystalline silicon, ABS Solar Panel: Cable length DC: Approx. 30mm/1,2 inch Solar Panel Size: Approx. 16 x 9,5 x 0,5 cm/6,3 x 3,7 x 0,2 inches (without batteries) Solar Panel Power: 15W Operating Voltage: 5 V Operating Current: 0-1200mA Output port: DC Fan: Fan Size: Approx. 12 x 12 x 2,5 cm/4,7 x 4,7 x 1,0 inches Interface: DC Current: 0,32A Speed: 2500 10% rpm Noise: 39,0 dBA Air Volume: 87,18 CFM Power: 3.84 W Lifespan: 40 at 5000 Bearing Structure: Double Ball Bearing Gross weight: Approx. 250g/8,8 oz Application: kitchen, greenhouse, pet house, chicken coop, tree house and RV etc. List of packages: 1 x Solar Panel 1 x Exhaust Fan 1 x Suction Cup 1 x Manual Note: Use the solar panel in the sun