Details milwaukee c12jsr radio tough jobsite radio with advanced technology tuning for high reception accuracy and total signal clarity these milwaukee radios are powered by 12v battery with 8 hours runtime or 240v mains supply full weatherproof aluminium speakers give rich quality sound and the digital display tuner allows accurate signal selection a mute button instantly kills the volume a very handy weatherproof mp3 player compartment is a useful addition to the use of this radio when out on