Functions: Radio with two wave bands (FM/AM) Power generating and accumulating by solar energy in high-efficiency Features: Power generating by solar energy, power accumulating by inside chargeable battery and external battery needed Eco-friendly, economy and safety, (the common battery will leak easily) High-sensitive FM (frequency modulation) reception, catch every wonderful electric wave anywhere at any time Solar energy power transferring in high-efficiency, low power consumption and long radio time Earphone (antenna also) output, the operation method is simple and convenient Volume adjustable Charge indicator will light when charging by sunlight Thinner design and simple pattern Attached with a buckle and a cord to hitch this product onto your bag or other places Main technical parameters: Radio: Sensitive degree of FM (frequency modulation): better than 20uV Sensitive degree of AM (medium wave): better than 5V/m Receive scope of FM (frequency modulation): 88 to 108MHz Receive scope of AM (medium wave): 530 to 1,600kHz Radio time after one hour sunlight in 500W/m2: about 40 to 70 minutes Radio work time after being charged fully: more than eight hours The time of charging fully by sunlight in 500W/m2: 11 to 13 hours The audio frequency output power: 15mW Main parts lifespan: Switch: more than 5,000 times Whole unit: more than five years Plastic part: more than five years Size and weight: Product size: about 89 x 55 x 23mm Product weight (earphone and cord are not included): about 60.5g Others: Specification of built-in battery: 120mAh, 1.2V