Portable Wind Water Turbine Generator for Outdoor Power and Charging Use Portable Wind and Water-Powered Generator Product Model: 2020-18187 Dimensions: Diameter 18 cm, Height 18 cm, Thickness 7 cm Weight: 0.75 kg ± 0.10 kg Performance Specifications Output Port: 1 x 5V USB (expandable) Maximum Output Power: 25 W Charging Cable Length: 1.8 m Wind Performance Minimum Start-up Wind Speed: 10.8 km/h Maximum Withstand Wind Speed: 90 km/h Wind Speed for 25W Peak Output: 65 km/h Water Flow Performance Minimum Start-up Water Flow Speed: 1 km/h Maximum Withstand Water Flow Speed: 11 km/h Water Flow Speed for 25W Peak Output: 6.9 km/h Product Description: This is a small, portable, dual-purpose wind and water power generator that can generate electricity from either wind or water flow. It outputs 5V USB power and is suitable for charging small outdoor emergency devices. Actual output power varies dynamically depending on wind speed and water flow speed.