Using a dedicated charger :The first time you use the radio before , please use the supplied charger G-88C to the local built-in NiMH rechargeable battery pack (600mAh) rechargeable would be G-88C charging switch to \" safe charging block \" charging time maintaining a continuous 16 hours or more. Usually also ask you to use the \" safe charging block \" built-in rechargeable battery for a long time to trickle charge , in order to ensure adequate electricity use in emergency situations , it is recommended that you use the built- hand way rechargeable batteries . 1.Before charging , place the radio 's power switch to \"off\" position .2.8 hours charging block \" needs 8 hours charging time , charging is completed , please disconnect the power supply to avoid overcharging and damage the battery .3.charging, do not be emergency lighting ( 6 ) opened, in order to avoid excessive current and damage the charger.Product Features: 1.FM / MW / SW ( 1-2 ) 4 -band receiver systemProprietary tuning knob speed control2.5 inch Speaker with excellent sound quality3.Hand crank recharge4.High Efficient Power generator for cranking charging5.Built-in Emergency LED light6.Earphone jack7.DC adapter jack8.Compact and portable Technical Parameters: 1.Frequency:-FM: 87~108MHz-AM: 525~1710kHz-SW1: 3.20~7.60MHz-SW2: 9.20~22.0MHz2.Sensitivity:-FM is superior to 10V-MW is superior to 1mV / m-SW is superior to 30V3.Dimensions: 16.8 x 14.8 x 5.4 cm Package Includes: 1 x Radio1 x Built-in rechargeable Ni-MH battery1 x AC Charger1 x User manual Kind notes: All accessoires are original packing, if needs adapter for other market, please let us know.