Solar Lamp with Radio Built-in battery: polymer 3.7V 1500mAh Solar panel: 2.8mm 5V 90mA Charging time: 20H(by solar) / 5H(by dynamo) / 5H(by USB) Using time: lamp 7H or flashlight 32H or radio 18H or siren 7H Radio frequency: FM76-108MHz LED brightness: 2500mcd Speaker power: 8Ω 0.5W Output: DC 5.0V 500mA Input: DC 5.0V 500mA Raw Material: ABS,PP 12 LED reading lamp with brightness adjustment FM radio with volume adjustment Emergency charger for cellphones Big sound siren/alarm Battery/Charging indicator Speaker Powered by: solar/crank dynamo/PC USB