Functions: FM/WB reception automatically Cranking for power generating and accumulating efficiently Charges external things to meet an emergency (to solve the extremely urgent problem when your phone or other digital things run out of power) Features: Cranking for power generation, no exterior batteries are needed, keep energy by built-in chargeable battery; green, environment-friendly, economical, safety(the common battery will leak easily) High-sensitive FM/WB reception which can catch every wonderful electric wave anywhere at any time Huge caliber loudspeaker, the sound is silvery and resounding Searching stations automatically, the operation method is simple and convenient Professional handle design. It is the perfect combination of light weight and high-efficiency Low-noise and long lifespan Fashionable style Main technical parameters: Radio: Sensitive degree of the FM: better than 15uV Sensitive degree of the WB: better than 15uV Receiving scope of the FM: 88 to 108 MHz Receiving scope of the WB: 147 to 170 MHz The audio frequency power output: ≥ 100 mW Radio work time after 1 minute cranking: ≥ 10 minutes Radio work time after being charged fully: ≥ 90 minutes Charging for external things: Voltage Output: 5.6V Maximum power output: ≥ 2.5W Mobile phone's working time after 3 minutes cranking: 2 to 8 minutes Main parts lifespan: Switch ≥ 5000 times The whole unit ≥ 5 years The plastic part ≥ 5 years Size and weight: Product size: about 77 x 50 x 87mm Length of antenna stretches (part of protrusion): about 220mm Product weight: about 147g Others : Specification of built-in battery: 120mAh, 2.4V Caliber of the built-in loudhailer: 50 mm