The milwaukee m18rc 0 radio charger with a built in charger function allows for quick convenient charging of any m18 battery or electronic devices via usb port it has an amfm tuner with digital processor that delivers highest reception accuracy and signal clarity and a premium speaker with a 40 watt amplifier that produces a rich full sound the reinforced roll cage and metal handles protects against abusive jobsite conditions and the weather sealed auxiliary compartment protects mp3 players and