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 system Proprietary tuning knob speed control 2.5 inch Speaker with excellent sound quality 3.Hand crank recharge 4.High Efficient Power generator for cranking charging 5.Built-in Emergency LED light 6.Earphone jack 7.DC adapter jack 8.Compact and portable Technical Parameters: 1.Frequency: -FM: 87~108MHz -AM: 525~1710kHz -SW1: 3.20~7.60MHz -SW2: 9.20~22.0MHz 2.Sensitivity: -FM is superior to 10V -MW is superior to 1mV / m -SW is superior to 30V 3.Dimensions: 16.8 x 14.8 x 5.4 cm Package Includes: 1 x Radio 1 x Built-in rechargeable Ni-MH battery 1 x AC Charger 1 x User manual Kind notes: All accessoires are original packing, if needs adapter for other market, please let us know.