Unho Excavator Radio Heavy Duty Loader Radio,2mA Standby current,12V/14V Universal,Two-Way AM/FM Radio With MP3 Player Car Vehicle Radio for Excavator, Tractor, Truck, Kart, Yacht,Loader,Grader,Earth Moving Machine All world frequency in unit; Aux-in PASS AUTHORITY TESEING: Certified thunder-proof, aseismic and waterproof, also have a much higher resistance to vibration than most of other radios 12V/24V automatically interchangeable by radio AM/FM brand but without CD due to dust problem Standby current is 2mA,Long time no use will be no battery consumption