WaterLily USB charges your USB devices using Water or Wind. Power Smartphones, Battery Banks, Cameras, Camp Lights, Speakers, GPS, and more! Up to 15W of power. Capture energy while you sleep! Set up WaterLily overnight for full batteries in the morning. Durable, shockproof housing and weatherproof design. Dimension: 7” x 7” x 3” (180 mm x 180 mm x 76 mm). Weight: 1.3 kg.