Dynamo AM/FM Radio Dynamo AM/FM Radio with Charger and Switch Lifetime of 5,000 Times Functions: Cranking for power in high efficiency FM, AM radio function Charge a mobilephone or other digital things to meet an emergency Lighting Features: Cranking for power generation, never need batteries, keep energy by built-in rechargeable battery; green, eco-friendly, economic, safe (the common battery will leak easily) Low noise but high efficiency, low power consumption, radio can work for a long time Adopts the best integrated radio circuit with high sensitive FM and AM radio that can catch every electric wave anywhere at any time Lighting Radio tuning display Speaker and earphone output, volume is adjustable Charge for external things efficiently to meet an emergency (can solve the extremely urgent problem which your phone or other digital things run out of power) Exquisite, simple and delicated Main Technical Parameters: Sensitive degree of the FM (frequency modulation) better than 15uV Sensitive degree of the AM (medium wave) better than 3mV/m Receive scope of the FM (frequency modulation): 88 to 108MHz Receive scope of the FM (medium wave): 530 to 1,650KHz Audio frequency output power: more than equal to 100mW Radio work time after 1 minute cranking: about 10 minutes Radio work time after being charged fully: about 2.5 hours Charge for external things: Voltage output: 5.6V Max output power: more than 2.5W Mobilephone's talking time after 3 minutes cranking: 2-8 minutes Main parameters of lighting: Max.Luminous flux: more than equal to 2lm Max. Brightness: more than equal to 20,000mcd Lighting time after 1 minute cranking more than equal to 60 minutes Main parts life-span: Switch lifetime: 5,000 times The whole unit lifetime: 5 years Plastic part lifetime: 5 years Size and weight: Product size: about 134 x 42 x 67mm Product weight: about 176g Others: Specification of built-in battery: 80mAh, 3.6V