This radio is charged with solar energy. Practical for listening to sports, music, or weather. A must have for camping! Provides 20 minutes of listening after only 1 minute of cranking. Enjoy 7 hours of listening on a full crank charge. This solar radio will go for 35 to 40 hours if fully solar charged making it great in an emergency or survival situation. Features durable weather resistant construction, AM/FM and WB (weather band) frequencies. Can be powered by the sun or hand cranked. No batteries are required. Measures 2.25 x 3 x 3.625 inches. Price includes shipping.