Solar Dynamo,Digital Display,Radio AM FM,Dynamo Digital Display Radio AM/FM Function & Features: 1.Cranking for power generation 2.Charged by solar panel 3.Charged by external adapter (optional) 4.Digital display of frequency, 2 band: FM/AM 5.Digital clock, timing power on 6.Charge digital devices, mobile phone, etc. 7.Lighting function Main Technical Parameters:Radio:1. Sensitivity of the FM Better than 10 uV 2. Sensitivity of the AMBetter than 3 mV/m3. Reception scope of the FM87 108 MHz4. Reception scope of the AM520 1620 KHz5. The audio frequency output power100 mW6. Radio working time after 1 minute cranking (2.5 - 3 circles/s)18 - 27 minutes7. Lighting time after 1 minute cranking (2.5 - 3 circles/s)27 – 36 minutes8. Speaking time after 3 minutes cranking for charging mobile phone (2.5 - 3 circles/s)4 – 15 minutes9. Radio working time after 1 hour charging under sunlight(500W/ M2 )20 - 30 minutes10.Lighting time after 1 hour charging under sunlight(500W/ M2 )23 – 32 minutes11.Max. Current flux of being charged by solar energy20mA12.Time of being fully charged under sunlight(500W/ M2 )35 – 42 hours13. Radio working time after being fully charged7 – 9 hours14. Lighting time after being fully charged4 – 6 hours15. Max. Luminous flux11– 14LMCharged by outside power1. Input voltage 5 - 5.2V 2. Charging interfaceDC plug dia3.5*dia1.33. Fully charged time6 - 8 hoursMain parts life-span:Switch 5000 times The whole unit5 yearsThe plastic part5 yearsOthersSpecification of built-in battery 300mAh, 3.6v Diameter of built-in speakerΦ36mm (two)Generator power5W