【High Efficiency Solar Panel】4W 12V monocrystalline silicon solar panel delivers reliable power for outdoor use and emergency situations. 【Direct Power Output】Features a 5521 DC female connector for direct power output without an internal battery, ensuring continuous power supply to electronic devices. 【Compact and Portable】With dimensions of 150x150mm, this solar panel is easy to carry and convenient for outdoor activities and fieldwork. 【Durable Construction】Made from high-quality, eco-friendly materials, the panel is waterproof and built to last in various weather conditions. 【Includes Matching Cooling Fan】This kit includes a DC fan that works seamlessly with the panel, ideal for creating airflow in enclosed spaces. Enjoy solar-powered ventilation wherever you go. Specifications: Material: Monocrystalline Silicon Power Output: 4W Working Current: 0-330mA Short Circuit Current: 335mA Working Voltage: 12V Short Circuit Voltage: 13.55V Dimensions: 150x150mm DC Connector: 5521 female Cable Length: 1.5m (approx.) Fan parameter: Fan Speed: 2500±10% RPM Air Flow: 87.18 CFM Air Pressure: 3.86mm H2O Noise Level: 39 dB Power Consumption: 2.5W Diameter: 12cm